[Bug libgomp/101581] [OpenMP] omp_target_memcpy – support inter-device memcpy

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101581

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Thomas pointed out that, at least with CUDA, the cuMemcpyPeer function could be
used (and cuMemcpy3DPeer for PR110813).

(For cuMemcpy, there is also CU_MEMORYTYPE_UNIFIED which might be of some use.)

BTW: "[patch] OpenMP: Call cuMemcpy2D/cuMemcpy3D for nvptx for
omp_target_memcpy_rect"
has been committed as r14-2792-g25072a477a56a7