Hát elvileg lehetséges. AOT compiling van, és ugyanazt a compiler-t használja, mint a cél stack. E:
https://github.com/illuhad/hipsycl

" When targeting the CUDA or HIP backends, hipSYCL just massages the AST slightly to get clang -x cuda and clang -x hip to accept SYCL code. hipSYCL is not involved in the actual code generation. Therefore any significant deviation in kernel performance compared to clang-compiled CUDA or clang-compiled HIP is unexpected. "