yaxunl added a comment. In https://reviews.llvm.org/D47154#1108813, @tra wrote:
> CUDA does not expose explicit AS on clang size. All pointers are treated as > generic and we infer specific address space only in LLVM. > `__nvvm_atom_*_[sg]_*` builtins should probably be removed as they are > indeed useless without pointers with explicit AS and NVCC itself does not > have such builtins either. Instead, we should convert the generic AS builtin > to address-space specific instruction somewhere in LLVM. > > Using `attribute((address_space())` should probably produce an error during > CUDA compilation. Sometimes we need to call functions defined in our device library which is written in OpenCL. Some function have pointer arguments in non-zero address space. To declare these functions in CUDA/HIP we need to use `__attribute__((address_space()))`. We use C-style cast to cast pointers in CUDA/HIP to a non-zero address space and pass them to the functions. I think `__attribute__((address_space()))` is still needed for this situation. https://reviews.llvm.org/D47154 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
