qbe-rs
go.vm
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| qbe-rs | go.vm | |
|---|---|---|
| 23 | 1 | |
| 45 | 280 | |
| - | - | |
| 4.6 | 1.3 | |
| 5 months ago | 11 months ago | |
| Rust | Go | |
| GNU General Public License v3.0 or later | GNU General Public License v3.0 only |
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qbe-rs
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Made my first LLVM front-end… Now what?
You can try buildling you own backend like llvm. A good example or starting point is probably QBE since it is extremely small but very functional.
- Best book on writing an optimizing compiler (inlining, types, abstract interpretation)?
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Rust port of B3 from WebKit, LLVM-like backend
How big is the whole backend? I've heard that it is small but I wanted to compare it to QBE which is around 8 KLoC and it is quite interesting too.
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Few lesser known tricks, quirks and features of C
I think QBE might be what you're looking for?
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Do you consider LLVM a complicated software? And are there any alternatives and how they compare to LLVM?
As far as I know, there is QBE, which is actually kinda underrated, and Cranelift, mainly designed for JIT compilation
Before that, I had spent a bit of time working with QBE, which is much simpler and really easy to write a frontend for. I switched to libgccjit though, because I got frustrated with a few of the things lacking from QBE (like the ability to easily keep track of where different variables live on the stack). I think for many hobby language projects, QBE would be a good option (my project was off the ground very fast using QBE, and I got pretty far before I ran into limitations I couldn't easily work around).
If one of your parameters is size/complexity of the backend and you prefer something smaller, have a look at qbe and cwerg
The alternatives are generally hidden inside of another compiler. The big exception seems to be qbe (https://c9x.me/compile/) however since the author appears to have written this code without peer review, it's not easy to read it's source code.
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Smallest possible self-hosting zig compiler
So my question is this: if a backend like QBE (~12k Loc) was added to Zig and Zig only had to compile Zig code (no C, etc) for that QBE backend -- about how many LoC would that Zig need to be?
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Building the fastest Lua interpreter.. automatically
GCC is written in C++ these days, so something like QBE(https://c9x.me/compile/) would be needed.
go.vm
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New Assembly Like Programming Language?
You might find something interesting if you were to look at virtual-machines - many are used for implementing scripting-languages, so while you'd not be writing assembly-code, you'd be writing "bytecode" programs.
You could write bytecode for Lua, or bytecode for Python for example.
I had a fun few weeks writing a simple virtual-machine, and a "compiler" which turns a simple assembly-language-like input into bytecodes which are then interpreted:
Other examples, along with lua/python which were already mentioned, might include "Writing a compiler in go" this turns a scripting-language into a set of opcodes which a VM executes:
What are some alternatives?
vsock - Package vsock provides access to Linux VM sockets (AF_VSOCK) for communication between a hypervisor and its virtual machines. MIT Licensed.
minivm - A VM That is Dynamic and Fast
ubpf - Userspace eBPF VM
well - The Future of Assembly Language. https://wellang.github.io/well/
mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
Som - Parser, code model, navigable browser and VM for the SOM Smalltalk dialect
cproc - C11 compiler (mirror)
Oberon - Oberon parser, code model & browser, compiler and IDE with debugger
Befunge - lang befunge 93 fast
simplelanguage - A simple example language built using the Truffle API.
asmjit - Low-latency machine code generation