On 05/17/2016 12:40 AM, Tom Udale wrote: > Hi Andrew, > > > It won't: GCC does not inspect asms to see if they do > > anything. Besides, if you are really worried about that > > you can put a "do nothing" comment into the asm. > > > > I think your reasoning about asm goto is sound. The > > only real problem you'll have is that GCC will > > remove statements which it knows have no side effects. > > Do you mean the asm statement itself? Will the volatile not prevent > that? No, it's just that you must make sure that whatever you are timing actually does something. Andrew.
