Replace ~80% of code in llvm_interpreter.rs by just hand-writing a prelude

[bollu]

I'm using your project as a guinea pig (again). I want to see how successful this approach of storing the prelude as a .ll file is.

This will also help to add more stuff, because now it's just a raw .ll file that anyone can read & see.

I should be able to rip out a huge chunk of the source code that tries to generate this prelude, and focus on the actual compile step.

• rip out prelude.ll
• load prelude.ll as an LLVM module
• JIT with external prelude
• what's the packaging story for prelude.ll? @polybuildr, I don't know how to package "assets" like these. Any ideas?

[polybuildr]

This seems like a lovely idea. Since you're familiar enough with LLVM to hand-write the prelude, this works out nicely.

About the packaging story, I believe cargo will bring the entire git repository when installing something but I'm ready to delay finding out until I actually distribute Balloon using Cargo. As for the location, it seems like this is a "lib"-like thing (where preludes written in Balloon for Balloon will also go), so we could make a /lib/llvm and put it there?

[bollu]

sure, lib sounds like a decent idea.