https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87752
--- Comment #1 from G. Steinmetz <gs...@t-online.de> --- Compiles without "simd" : $ cat z2.f90 subroutine foo (n, u, v) integer :: n real, pointer :: u(:), v(:) !$omp parallel do do i = 1, n u(:) = v(:) end do end $ gfortran -9-20181021 -c z2.f90 -fopenmp -O3 $ gfortran -9-20181021 -c z2.f90 -fopenmp -Ofast