On Thursday, 25 August 2016 at 11:16:52 UTC, Cecil Ward wrote:
* the GCC "__builtin_expect()"
Instead of adding individual micro-optimisation features like this, I'd be more interested in the potential for profile-guided optimisation (which *ideally* can make these micro-optimisation decisions automatically). Since DMD already has some framework in place to support code profiling, I suspect this is at least a feasible enhancement.
On the other hand, it might not be worth trying to play catch-up with existing PGO features in GCC/LLVM. If you're using PGO, you're probably already using these other backends for their more advanced static optimisers.
