The compiler supports standard pointer de-referencing and pointer arithmetic for vectors. Post increment of the pointer is the most efficient form for scheduling. No special intrinsic functions are needed to load vector registers.
v8int32 * ptr_coeff_buffer = (v8int32 *)ptr_kernel_coeff;
v8int32 kernel_vec0 = *ptr_coeff_buffer++; // 1st 8 values (0 .. 7)
v8int32 kernel_vec1 = *ptr_coeff_buffer; // 2nd 8 values (8 .. 15)