Hi! On Mon, Mar 16, 2020 at 11:55:01PM +0000, Shrader, David Lee wrote: > Thank you for the reply. So, what you're saying is that the output of `gcc -Q --help=optimizers` doesn't necessarily reflect what optimization gcc is going to do when -O0 is being used, correct? This is because no (or very little) optimization is actually allowed to be done when -O0 is use. Yes. Some of the documentation isn't clear on this, but in context it should be clear? Segher