[LLVMdev] newbie question for type comparison

[Gordon Henriksen]

On Apr 21, 2008, at 15:39, John Criswell wrote:

> Gordon Henriksen wrote:
>
>> On Apr 21, 2008, at 15:07, John Criswell wrote:
>>
>>> if (AI->getAllocatedType()->getTypeID() == Type::StructTyID)
>>
>> Better: if (isa<StructType>) or if (StructType *sT =  
>> dyn_cast<StructType>).
>>
>
> Just out of curiosity, what is it better?  Does it use less virtual  
> function calls?


No (it calls getTypeID) but it's more readable and in general respects  
subtypes.

— Gordon