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Part 1 of changes needed for USM alloc/dealloc impl. This is part of the SYCL support upstreaming effort. The relevant RFCs can be found here: https://discourse.llvm.org/t/rfc-add-full-support-for-the-sycl-programming-model/74080 https://discourse.llvm.org/t/rfc-sycl-runtime-upstreaming/74479 --------- Signed-off-by: Tikhomirova, Kseniya <kseniya.tikhomirova@intel.com>