[cfe-dev] PATCH: Cleanup function redeclaration representations

[Chris Lattner]

On May 4, 2008, at 11:53 AM, Mike Stump wrote:

> On May 4, 2008, at 11:42 AM, Doug Gregor wrote:
>> My gut tells me that most clients that are doing any kind of  
>> analysis will care only about the "aggregate" version of the decl.
>
> Yeah, I wonder if the memory saving of having the client declare up  
> front what they want would outweigh the downside of having the code  
> only collects what the client is interested in.  Having two decls  
> when a client only really needs one would be unfortunate.  If  
> downside isn't a big deal, having the client essentially say, I only  
> need the merged decls would be best.

This doesn't work if you want clang to stream out ASTs to disk as a  
side effect of compilation.  Because you don't know the ultimate  
client of those ASTs, you end up having to save everything anyway.

-Chris