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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/115152] New: wrong code at -O3 with "-fno-tree-fre -fno-tree-dominator-opts -fno-tree-loop-im" on x86_64-linux-gnu Date: Sat, 18 May 2024 20:22:51 +0000 [thread overview] Message-ID: <bug-115152-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115152 Bug ID: 115152 Summary: wrong code at -O3 with "-fno-tree-fre -fno-tree-dominator-opts -fno-tree-loop-im" 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 12.*, and affects 13.* and later. Compiler Explorer: https://godbolt.org/z/cvM1TYd7h [598] % 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/15.0.0/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 --enable-multilib Thread model: posix Supported LTO compression algorithms: zlib gcc version 15.0.0 20240516 (experimental) (GCC) [599] % [599] % gcctk -O3 small.c; ./a.out [600] % [600] % gcctk -O3 -fno-tree-fre -fno-tree-dominator-opts -fno-tree-loop-im small.c [601] % ./a.out Aborted [602] % [602] % cat small.c int a, b, c, d; char e[1] = {1}; int main() { for (a = 0; a < 3; a++) for (b = 0; b < 2; b++) c = e[0] = e[0] ^ d; if (!c) __builtin_abort(); return 0; }
next reply other threads:[~2024-05-18 20:22 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-05-18 20:22 zhendong.su at inf dot ethz.ch [this message] 2024-05-18 21:40 ` [Bug tree-optimization/115152] [13/14/15 Regression] " pinskia at gcc dot gnu.org 2024-05-18 21:40 ` pinskia at gcc dot gnu.org 2024-05-18 21:53 ` pinskia at gcc dot gnu.org 2024-05-18 21:54 ` pinskia at gcc dot gnu.org 2024-05-20 18:27 ` [Bug tree-optimization/115152] [13/14/15 Regression] wrong code at -O3 with "-fno-tree-fre -fno-tree-dominator-opts -fno-tree-loop-im" on x86_64-linux-gnu since r13-455 jakub at gcc dot gnu.org 2024-05-20 18:36 ` jakub at gcc dot gnu.org 2024-05-21 6:38 ` rguenth at gcc dot gnu.org 2024-05-21 9:20 ` jakub at gcc dot gnu.org 2024-05-21 11:57 ` jakub at gcc dot gnu.org 2024-05-22 7:14 ` cvs-commit at gcc dot gnu.org 2024-05-22 7:19 ` cvs-commit at gcc dot gnu.org 2024-05-22 7:35 ` cvs-commit at gcc dot gnu.org 2024-05-22 11:11 ` jakub at gcc dot gnu.org
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