AaronBallman wrote:

> If split stacks are negatively impacting profiling, debugging, or other 
> compiler development tasks, I have to ask, have we considered optimizing 
> clang stack usage?

Strong +1 to this.

> Apple platforms and tools are known to support this, so this only enables it 
> there for now.

I'm a bit concerned about this changing behavior only for Apple platforms; 
that's a different folks doing triage really need to understand. Doesn't Linux 
also support this functionality, so we'd at least get the coverage on more than 
one platform? (Linux could be done in a follow-up, but I'm mostly worried we'll 
only ever implement this for Apple at which point I question whether the extra 
complexity is something the community should maintain or not.)

https://github.com/llvm/llvm-project/pull/133173
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