https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99767
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- E.g. as int a[1024], b[1024]; void foo (void) { #pragma omp simd for (int i = 0; i < 1024; i++) if (b[i] > 23) { a[i] = b[i] + 1; int v = 1 / 0; } } (omp simd is there only to convince it to vectorize it and not give up).