LLVMSwift:LLVM C API 的 Swift 封装库

2017-01-12 10:01:56来源:作者:Github人点击


LLVMSwift is a set of Swifty API wrappers for the LLVM C API. It makes compiler development feel great from Swift!


To start emitting IR, you'll want to create a Moduleobject, with an optional Contextparameter, and an IRBuilderthat will build instructions for that module.

let module = Module(name: "main")let builder = IRBuilder(module: module)

Once you do that, you can start adding functions, global variables, and generating instructions!

let main = builder.addFunction(name: "main", type: FunctionType(argTypes: [], returnType: VoidType())let entry = builder.appendBasicBlock(named: "entry")builder.positionAtEnd(of: entry)builder.buildRetVoid()module.dump()

The IRBuilder class has methods for almost all functions from the LLVM C API, like:

builder.buildAdd builder.buildSub builder.buildMul builder.buildCondBr builder.addSwitch

and so many more.

Plus, it provides common wrappers around oft-used types like Function, Global, Switch, and PhiNode.


There are a couple, annoying steps you need to get it working before it'll build. Number one, you'll need a custom cllvmpkg-config file, which is included in the repo. Drop that in /usr/local/lib/pkgconfigand make sure you have LLVM installed through homebrew:

brew install llvm

Once you do that, you can add LLVMSwift as a dependency for your own Swift compiler projects!

This project is used byTrill for all its code generation.

Authors Harlan Haskins (@harlanhaskins) Robert Widmann (@CodaFi) License

This project is released under the MIT license, a copy of which is available in this repo.