jayfoad wrote:

> * Make the pointer layout trivially represent Bar#, and move the shenanigans 
> with the offset within LDS to the addrspacecast ops. Addrspacecast will be a 
> bit more expensive, but I assume it's never going to be on the "hot path".

Why would you need to cast namedbarrier pointers to any other address space?

https://github.com/llvm/llvm-project/pull/195613
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