Intel has been working on SYCL support within LLVM and various related efforts like the LLVM SPIR-V back-end as part of their oneAPI ambitions and Data Parallel C++ across their spectrum of hardware. The latest hitting upstream LLVM is libsycl as a SYCL run-time library. Libsycl will be ready for the LLVM 22 release due out around March of next year.
Intel Upstreams SYCL Runtime Library Into LLVM
Intel Upstreams SYCL Runtime Library Into LLVM