[LLVMdev] dyn_cast vs. dynamic_cast

[Chris Lattner]

On Nov 12, 2010, at 5:57 PM, Óscar Fuentes wrote:

> Trevor Harmon <Trevor.W.Harmon at nasa.gov> writes:
> 
> [snip]
>> Could someone  
>> please explain why I should use dyn_cast instead of dynamic_cast? (I  
>> thought all classes have v-tables...) Thanks,
> 
> For reducing executable size, LLVM builds with RTTI disabled where
> possible.

dyn_cast is also much much faster than dynamic_cast, which is really important because llvm uses dyn_cast all over the place.

-Chris