[LLVMdev] Adding fields in a already built type? (2)

[Stéphane Letz]

Le 15 juin 2010 à 23:05, Chris Lattner a écrit :

> 
> On Jun 15, 2010, at 12:45 PM, Stéphane Letz wrote:
>>>> 
>>>> Is that even possible?
>>> 
>>> It would work, but sounds really inefficient.  What are you really trying to do here?
>>> 
>>> -Chris
>> 
>> 
>> inefficient : do you mean because all users of the refined type would have to be "notified" ?
> 
> Yes.

Thanks for clarifying.

> 
>> The reason is that our code generator generates a struct (progressively adding fields) and generates code that access this struct (that is : the fields that are already added). If we cannot create the struct progressively, then we have to define a pass to build the complete struct, then define a second pass to generate the code. If we can simply create the struct progressively at LLVM level, then it make our code simpler.
> 
> LLVM doesn't support this sort of thing.  Is two passes really that bad?
> 
> -Chris


We'll do a two passes model.

Thanks again.

Stéphane Letz