llvm-hs/llvm-hs-kaleidoscope

Name: llvm-hs-kaleidoscope

Owner: llvm-hs

Description: Kaleidoscope Tutorial using llvm-hs

Created: 2017-01-20 09:31:38.0

Updated: 2018-05-02 08:52:33.0

Pushed: 2018-02-24 12:37:26.0

Homepage:

Size: 26

Language: Haskell

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README

llvm-tutorial-standalone

A minimal LLVM builder. Basically the same code as the Haskell Kaleidoscope tutorial uses but without going through a frontend AST.

If you want to roll a custom LLVM compiler backend this might be a good starting point for the backend.

Install

Check that your installed LLVM version is precisely 5.0.

vm-config --version

To build using stack:

ack build
ack exec main

To build using cabal:

bal sandbox init
bal install --only-dependencies
bal build

To run:

bal run
rocessing executable 'standalone' for tutorial-0.2.0.0...
duleID = 'my cool jit'

ne double @main() {
try:
ret double 3.000000e+01


uated to: 30.0

Usage

Code is split across

• Codegen
• JIT
• Main

The main program will use the embedded LLVM Monad to define a small program which will add two constants together.

Module :: AST.Module
Module = emptyModule "my cool jit"

c :: LLVM ()
c = do
fine double "main" [] $ \ptrToMain -> do
let a = cons $ C.Float (F.Double 10)
let b = cons $ C.Float (F.Double 20)
res <- fadd a b
ret res

 :: IO (AST.Module)
 = do
t ast = runLLVM initModule logic
nJIT ast
turn ast

This will generate and JIT compile into the following IR and use the LLVM execution engine to JIT it to machine code.

duleID = 'my cool jit'

ne double @main() {
y:
 = fadd double 1.000000e+01, 2.000000e+01
t double %1