This is awesome. I am impressed.

I recently wrote a toy compiler for x86_64. I use an external assembler.

My dream is to write a JIT compiler runtime.

https://GitHub.com/samsquire/compiler

My understanding is that you generate machine code and then mprotect the code to be executable then jump to the void * as a function pointer to execute generated instructions.

What I would like to understand more is tracing compilers and how they optimise hot loops. And how they deoptimise and optimise at runtime based on runtime information.