[llvm] [LLVM] add LZMA for compression/decompression (PR #83297)

[David Blaikie via llvm-commits]

dwblaikie wrote:

Excuse the outlandish suggestion, but given:

> I do get the part that multiple GPU variants give us a lot of redundancy in the data to compress away.

Is there any chance of some sort of domain-specific compression, especially that would be more resilient to the size of the kernels? (seems like increasing the compression level increases the compression window size, which has some cliff/break points for kernels of certain sizes, which seems unfortunately non-general - like it'd be nice to not have to push the compression algorithm so hard for smaller kernels, and it'd be nice if larger kernels could still be deduplicated)

https://github.com/llvm/llvm-project/pull/83297