Yes, there are such options, which of course you could discover with the strings tool. However, just yesterday I had to remove some such unsupported options employed by a customer, as they were responsible for errors in his QA suite. They do change more rapidly than with gcc; what may work with the latest 7.1, on your application,may not be advisable with 8.0. Also, particularly with the IPF compiler, they interact. For example, hlo optimizations can't be added at -O2, they can only be cut back from -O3.