If i am not mistaken the /Oi flag signals the compiler to replace functions with intrinsic versions. Also at some point Casey talked about rewriting sinf himself instead of using the c runtime library's version of it.
My question is, if we were to do that and implement sinf ourselves, do we give up on /Oi optimization or is there a way to give a hint to compiler that the function we wrote can be replaced with intrinsic sin?