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...ters and fat pointers (both of which are supported on our system in hardware). It would be nice, rather than hard-coding an address space, to have a property on DataLayout that would tell you if a specific address space contained GC pointers. We could then designate an address space that was both GCable and contained fat pointers, and another for non-GCable fat pointers. Making this configurable is definitely desirable. I like your idea of including a list of address spaces in data layout which contain GC pointers and making that query-able. That sounds quite reasonable. Unless anyone makes...

As I've mentioned on the mailing list a couple of times over the last few months, we've been working on an approach for supporting precise fully relocating garbage collection in LLVM. I am happy to announce that we now have a version of the code available for public view and discussion. https://github.com/AzulSystems/llvm-late-safepoint-placement

Now that the statepoint changes have landed, I wanted to start a discussion about what's next for GC support in LLVM. I'm going to sketch out a strawman proposal, but I'm not set on any of this. I mostly just want to draw interested parties out of the woodwork. :) Overall Direction: In the short term, my intent is to preserve the functionality of the existing code, but migrate