I use company-irony for C++ code completion. I have deleted the company-semantic backend from company-backends in my init.el.
Now I want to use Semantic and specifically the global-semantic-stickyfunc-mode to display current function at the top of the frame (this is useful if the function spans more than one frame). I enabled this in my init.el and it works.
So far I haven't noticed any problems with using Company and Semantic concurrently like this. Does anybody know if this might cause problems?