{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"\"read.ngroups.x\""}]}
                    "read.ngroups.x" => "__builtin_r600_read_ngroups_x",
                    "read.global.size.z" => "__builtin_r600_read_global_size_z",
                    "read.ngroups.y" => "__builtin_r600_read_ngroups_y",