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From: "shaohua.li at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/107407] New: Wrong code at -Os on x86_64-linux-gnu Date: Wed, 26 Oct 2022 07:44:54 +0000 [thread overview] Message-ID: <bug-107407-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107407 Bug ID: 107407 Summary: Wrong code at -Os on x86_64-linux-gnu Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: shaohua.li at inf dot ethz.ch Target Milestone: --- % gcc-tk -v Using built-in specs. COLLECT_GCC=gcc-tk COLLECT_LTO_WRAPPER=/zdata/shaoli/compilers/ccbuilder-compilers/gcc-97d1ed67fc6a5773c8c00875bfa3616a457cf5f9/libexec/gcc/x86_64-pc-linux-gnu/13.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../configure --disable-multilib --disable-bootstrap --enable-languages=c,c++ --prefix=/zdata/shaoli/compilers/ccbuilder-compilers/gcc-97d1ed67fc6a5773c8c00875bfa3616a457cf5f9 Thread model: posix Supported LTO compression algorithms: zlib gcc version 13.0.0 20221024 (experimental) (GCC) % % gcc-tk -O0 a.c && ./a.out 3 0 0 0 % gcc-tk -Os a.c && ./a.out 0 0 0 0 % cat a.c int printf(const char *, ...); int *a; static int **b = &a; int c[4]; int d; int e(int); static int f(char, int); void g() { e((f(0, 0), 0)); } int e(int h) { *a = 0; } int f(char k, int j) { for (;;) { for (; k <= 3; k++) { *b = &c[k]; for (; d <= 1; d++) *a = 3; } break; } } int main() { int i; g(); for (i = 0; i < 4; i++) printf("%d\n", c[i]); } % Compiler explorer: https://godbolt.org/z/dTa1dvKfT
next reply other threads:[~2022-10-26 7:45 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-26 7:44 shaohua.li at inf dot ethz.ch [this message] 2022-10-26 8:03 ` [Bug tree-optimization/107407] [12/13 Regression] Wrong code at -Os on x86_64-linux-gnu since r12-383-g32955416d8040b1f marxin at gcc dot gnu.org 2022-10-26 8:03 ` marxin at gcc dot gnu.org 2022-10-26 17:00 ` pinskia at gcc dot gnu.org 2022-10-28 9:48 ` rguenth at gcc dot gnu.org 2022-10-28 13:03 ` rguenth at gcc dot gnu.org 2022-10-28 13:40 ` cvs-commit at gcc dot gnu.org 2022-10-28 13:43 ` [Bug tree-optimization/107407] [12 " rguenth at gcc dot gnu.org 2022-12-12 11:20 ` cvs-commit at gcc dot gnu.org 2022-12-12 11:21 ` rguenth at gcc dot gnu.org
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