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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 rtl-optimization/110391] wrong code at -O2 and -O3 with "-fsel-sched-pipelining -fselective-scheduling2" on x86_64-linux-gnu Date: Sat, 24 Jun 2023 13:20:52 +0000 [thread overview] Message-ID: <bug-110391-4-jtWzIfPVMK@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-110391-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110391 Zhendong Su <zhendong.su at inf dot ethz.ch> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|wrong code at -O2 and -O3 |wrong code at -O2 and -O3 |with "on x86_64-linux-gnu |with | |"-fsel-sched-pipelining | |-fselective-scheduling2" on | |x86_64-linux-gnu --- Comment #1 from Zhendong Su <zhendong.su at inf dot ethz.ch> --- It appears to be a regression from 11.*, and affects 12.* and later. Compiler Explorer: https://godbolt.org/z/WEhzh66Pz [571] % 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 20230623 (experimental) [master r14-924-gd709841ae0f] (GCC) [572] % [572] % gcctk -O3 -fsel-sched-pipelining -fselective-scheduling2 -fPIC small.c [573] % ./a.out Floating point exception [574] % [574] % gcctk -O3 small.c; ./a.out [575] % [575] % cat small.c int printf(const char *, ...); int a, d, b, i = 2, e; static unsigned c = 1; char f, g = 1; void j() { k: if (b) for (;;) __builtin_abort(); unsigned l = i && 2 / c * d % g; if (a) { l = c; g = i; if (d > 1) { printf("%d", c); goto k; } } a = c = l; } int main() { a = -2; j(); i = 0; f = ~c; if (f > 0) { printf("%d", f); a = 2 % i; } return 0; }
next prev parent reply other threads:[~2023-06-24 13:20 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-24 13:17 [Bug rtl-optimization/110391] New: wrong code at -O2 and -O3 with "on x86_64-linux-gnu zhendong.su at inf dot ethz.ch 2023-06-24 13:20 ` zhendong.su at inf dot ethz.ch [this message] 2023-06-24 15:23 ` [Bug rtl-optimization/110391] [12/13/14 Regression] wrong code at -O2 and -O3 with "-fsel-sched-pipelining -fselective-scheduling2" on x86_64-linux-gnu pinskia at gcc dot gnu.org 2023-06-26 9:12 ` zhendong.su at inf dot ethz.ch 2023-06-29 9:18 ` zhendong.su at inf dot ethz.ch 2023-06-29 17:33 ` zhendong.su at inf dot ethz.ch 2024-03-04 1:49 ` law at gcc dot gnu.org
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