hdelan marked an inline comment as not done. hdelan added a comment. In DPC++ for CUDA we use libclc as a wrapper around CUDA SDK's libdevice. Like libdevice we want to precompile libclc to bc for the CUDA backend without specializing for a particular arch, so that we can call different __nv funcs based on the arch. For this reason we use the `__nvvm_reflect` llvm intrinsic.
Without a clang builtin a number of workarounds are necessary to get the desired behaviour from `__nvvm_reflect`. 1. We must declare `__nvvm_reflect` in source code everywhere where it is used. 2. Some addrspace casting is necessary in openCL, since strings are in the__constant address space. We must use an IR wrapper function to ensure the correct behaviour. See https://github.com/intel/llvm/blob/sycl/libclc/ptx-nvidiacl/libspirv/reflect.ll We agree that `__nvvm_reflect` is not a perfect solution, but it is something we must use because of libdevice. Adding the clang builtin would enable us to write libdevice-like libraries without having to resort to the methods mentioned above. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D137154/new/ https://reviews.llvm.org/D137154 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
