d8104bfc9e
This adds a SPIR-V intrinsic for associating a name (textual identifier) to a specialisation constant. The name is encoded in metadata, and is intended to be used within LLVM / by the SPIR-V BE (e.g. #134016 would be a direct user), as it is never emitted into the SPIR-V object. Non-boolean and composite specialisation constants will be handled in the future, via dedicated intrinsics, if there is interest.