This is rather "embed intermediate representation, extract, run another target's back end, and link". I was hoping this would be explaining how to go from ARM by uplifting executable to LLVM IR and retargeting for Intel. This is notionally already possible with ELF and PE executables using McSema (https://github.com/trailofbits/mcsema).

If anyone is working on this please email me (address in profile), it's something we slated for a future research project and I'd love to talk.