Swift開源：LLVMSwift - LLVM C API 的 Swift 封裝庫

wanenjie 7年前發布 | 8K 次閱讀 LLVM API Swift Apple Swift開發

LLVMSwift

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

Usage

To start emitting IR, you'll want to create a Module object, with an optional Context parameter, and an IRBuilder that 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()</code></pre> 
  
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 .
 
  
Installation
 
  
There are a couple, annoying steps you need to get it working before it'll build. Number one, you'll need a custom cllvm pkg-config file, which is included in the repo. Drop that in /usr/local/lib/pkgconfig and 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.
 
  
 
 
  
 
 
  
 
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