[Bug c/120753] is_device_ptr does not compile if given a pointer which is a member of a struct, i.e. is_device_ptr(u.ptr), where mystruct u; and struct mystruct{double *ptr;int something;}; will fail to compile (note that map works in this case)

[schulz.benjamin at googlemail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120753

--- Comment #2 from Benjamin Schulz <schulz.benjamin at googlemail dot com> ---
Created attachment 61753
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61753&action=edit
mdspan_omp.h

mdspan_omp.h with the change in the #pragma omp target teams loop to the
#pragma omp target teams parallel for loop which makes the outputs of the qr
decomposition correct.... 

but of course the ice is still there once we optimize with -O1.