felipepiovezan wrote:

> > > do we have in mind any other languages that will implement this?
> > 
> > 
> > I suspect any language wanting to implement this notion of function 
> > splitting (e.g. all the users of corosplitter) and virtual frames could 
> > have a use for this
> 
> We already have `.cold` functions that do this in clang. Might be nice to 
> support that on the llvm side so this could be testable here.

Mmmmm there are two things that confuse me about this idea:

* I thought `.cold` functions came from the hot-cold-split pass, not from Clang?
* Don't those create a new frame on the stack, i.e. a new CFA?

https://github.com/llvm/llvm-project/pull/112720
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