Function emit_hexagon_va_arg_musl 

fn emit_hexagon_va_arg_musl<'ll, 'tcx>(
    bx: &mut GenericBuilder<'_, 'll, FullCx<'ll, 'tcx>>,
    list: OperandRef<'tcx, &'ll Value>,
    target_ty: Ty<'tcx>,
) -> &'ll Value