llvm-project

28aa5a64 - [libclc] Declare workitem built-ins in clc, move ptx-nvidiacl workitem built-ins into clc (#144333)

[libclc] Declare workitem built-ins in clc, move ptx-nvidiacl workitem built-ins into clc (#144333) Changes in this PR: * Declare most of workitem functions in clc and opencl folders. * Call clc workitem function in corresponding OpenCL workitem function. * Move ptx-nvidiacl workitem built-in implementations into clc. * Move a few amdgcn workitem built-in implementations into clc. * Include only needed headers in OpenCL workitem functions. * Implement get_local_linear_id, get_max_sub_group_size, get_num_sub_groups, get_sub_group_id, get_sub_group_local_id, get_sub_group_size for ptx-nvidiacl. llvm-diff shows this PR adds a few new symbols to nvptx64--nvidiacl.bc. llvm-diff shows no change to amdgcn--amdhsa.bc, nvptx--.bc and nvptx64--.bc.