https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108699
--- Comment #3 from Kewen Lin <linkw at gcc dot gnu.org> --- One more test case fail with abort on both LE & BE (with -Ofast -mcpu=power9): ---- #define N 16 unsigned long long vals[N]; unsigned int res[N]; unsigned int expects[N] = {0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0}; unsigned long long inputs[N] = {0x0000000000000000ULL, 0x0000000000000001ULL, 0x8000000000000000ULL, 0x0000000000000002ULL, 0x4000000000000000ULL, 0x0000000100000000ULL, 0x0000000080000000ULL, 0xa5a5a5a5a5a5a5a5ULL, 0x5a5a5a5a5a5a5a5aULL, 0xcafecafe00000000ULL, 0x0000cafecafe0000ULL, 0x00000000cafecafeULL, 0x8070600000000000ULL, 0xffffffffffffffffULL}; __attribute__ ((noipa)) void init () { for (int i = 0; i < N; i++) vals[i] = inputs[i]; } __attribute__ ((noipa)) void do_parity () { for (int i = 0; i < N; i++) res[i] = __builtin_parityll (vals[i]); } int main (void) { init (); do_parity (); for (int i = 0; i < N; i++) if (res[i] != expects[i]) __builtin_abort(); return 0; } ----