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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/99927] New: [11 Regression] Maybe wrong code since r11-39-gf9e1ea10e657af9f Date: Tue, 06 Apr 2021 08:22:33 +0000 [thread overview] Message-ID: <bug-99927-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99927 Bug ID: 99927 Summary: [11 Regression] Maybe wrong code since r11-39-gf9e1ea10e657af9f Product: gcc Version: 11.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: marxin at gcc dot gnu.org CC: rguenth at gcc dot gnu.org Target Milestone: --- Reduced from yarpgen: $ cat func.cpp short var = 9; int test_var_1 = 0, test_var_5 = 0, test_var_8 = 0, test_var_10 = 0; void test(unsigned var_6, unsigned long long var_9) { for (; test_var_10;) if (test_var_5) for (;; test_var_1 += test_var_8) ; for (int i_10 = 0; i_10 < 23; i_10 += 4) for (unsigned int i_11 = 0; i_11 < var_6 + 471511258; i_11 ++) if ((var_9 == 0) % var_6) var = 0; } int main() { test(3823456048, 10675217251973); __builtin_printf("%u\n", var); if (var != 9) __builtin_abort (); return 0; } $ g++ func.cpp && ./a.out 9 $ g++ func.cpp -O3 && ./a.out 0 Aborted (core dumped)
next reply other threads:[~2021-04-06 8:22 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-06 8:22 marxin at gcc dot gnu.org [this message] 2021-04-06 8:54 ` [Bug tree-optimization/99927] " rguenth at gcc dot gnu.org 2021-04-06 13:57 ` jakub at gcc dot gnu.org 2021-04-06 14:02 ` jakub at gcc dot gnu.org 2021-04-06 14:17 ` rguenth at gcc dot gnu.org 2021-04-06 14:44 ` jakub at gcc dot gnu.org 2021-04-06 15:03 ` jakub at gcc dot gnu.org 2021-04-06 15:37 ` jakub at gcc dot gnu.org 2021-04-06 15:42 ` jakub at gcc dot gnu.org 2021-04-06 19:59 ` segher at gcc dot gnu.org 2021-04-06 20:05 ` jakub at gcc dot gnu.org 2021-04-07 17:38 ` [Bug tree-optimization/99927] [11 Regression] Wrong " segher at gcc dot gnu.org 2021-04-07 17:46 ` jakub at gcc dot gnu.org 2021-04-07 18:09 ` segher at gcc dot gnu.org 2021-04-08 2:39 ` segher at gcc dot gnu.org 2021-04-12 14:21 ` rguenth at gcc dot gnu.org 2021-04-12 18:00 ` segher at gcc dot gnu.org 2021-04-18 15:01 ` cvs-commit at gcc dot gnu.org 2021-04-18 15:08 ` [Bug rtl-optimization/99927] " segher at gcc dot gnu.org 2021-04-27 11:40 ` jakub at gcc dot gnu.org 2021-04-29 10:44 ` rguenth at gcc dot gnu.org 2021-07-19 16:07 ` [Bug rtl-optimization/99927] [9/10 only] " pinskia at gcc dot gnu.org 2021-07-19 16:07 ` pinskia at gcc dot gnu.org 2021-07-19 17:13 ` cvs-commit at gcc dot gnu.org 2021-07-19 17:15 ` cvs-commit at gcc dot gnu.org 2021-07-19 17:16 ` segher at gcc dot gnu.org
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