jhuber6 wrote:

Unrelated, I need to hurry up and try to make the new driver the default for 
CUDA and HIP upstream at some point.

I've had some thoughts about how to accomplish this in the past. For the new 
driver, `.llvm.offloading` is a single section that contains all of the 
embedded device code to create a fat binary. It should be possible to use [ELF 
compression](https://blogs.oracle.com/solaris/post/elf-section-compression) to 
reduce the size of that binary. Can we do something similar here? If memory 
serves, the `clang-offload-bundler` does a similar section embedding for object 
files. This wouldn't work for LLVM-IR host binaries however, since the host 
binary won't be an ELF. Also it's not exactly portable with COFF.

@MaskRay do you know if ELF compression is feasible for this application?

https://github.com/llvm/llvm-project/pull/67162
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