supernodal does not build with UVM enabled

[jjwilke]

If Kokkos is built with UVM enabled, the supernodal build fails with several static asserts about invalid conversions, e.g.

static assertion failed with "View assignment must have compatible spaces"
src/sparse/impl/KokkosSparse_sptrsv_solve_impl.hpp(2586)
  Kokkos::View<scalar_t*, memory_space> work = thandle.get_workspace ();

This does not occur on Cuda builds without UVM or OpenMP builds.

[ndellingwood]

Does replacing
Kokkos::View<scalar_t*, memory_space> work = thandle.get_workspace ();
with
auto work = thandle.get_workspace ();
fix this?

[jjwilke]

No, I started to get more conversion errors in other places and gave up : )

[ndellingwood]

@iyamazaki was this fixed with your updates in PR #675 or #676? I think you had addressed this but I lost track of which PR.

[iyamazaki]

Hi, @nellingwood. No, it has not. But, I am working with @e10harvey to integrate the KK interface for TRMM and TRTRI, and that PR should fix this.

[ndellingwood]

Thanks @iyamazaki ! Wasn't trying to rush you, I mistakenly thought this was part of a different PR.

[ndellingwood]

Marked as In Develop based on merge of #680, thanks @iyamazaki !