[LLVMdev] RFC: Constant Creation API

Richard Pennington rich at pennware.com
Fri Jul 24 05:08:58 PDT 2009

I hate to say it (because I already made the changes), but keeping 
compatibility with 2.5 is a good thing.


Owen Anderson wrote:
> So, as you all probably noticed, the APIs for creating constants have 
> been moved (or in a specific cases, are about to be moved) from static 
> methods on Constant to instance methods on LLVMContext.
> However, as was recently pointed out on llvm-commits and on IRC, this is 
> no longer strictly necessary.  Because types have contexts, all of the 
> constant subclasses could be friended to LLVMContext, and then put the 
> work of uniquing by accessing the context off of the type.
> There are obviously some pros and to both approaches.  Going back to the 
> old-style increases compatibility with 2.5, and breaks up the massive 
> LLVMContext class.  On the downside, it would cause massive thrashing on 
> TOT, because I will have to revert about two weeks worth of commits in 
> widely dispersed parts of the tree, and because a number of clients have 
> already switched to the new TOT API.
> Any comments and/or opinions on this decision are welcome.
> --Owen
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