TypeScriptCompiler - TypeScript Compiler (by LLVM)


TypeScript Native Compiler

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abstract class Department {
    constructor(public name: string) {}

    printName(): void {
        print("Department name: " + this.name);

    abstract printMeeting(): void; // must be implemented in derived classes

class AccountingDepartment extends Department {
    constructor() {
        super("Accounting and Auditing"); // constructors in derived classes must call super()

    printMeeting(): void {
        print("The Accounting Department meets each Monday at 10am.");

    generateReports(): void {
        print("Generating accounting reports...");

function main() {
    let department: Department; // ok to create a reference to an abstract type
    department = new AccountingDepartment(); // ok to create and assign a non-abstract subclass
    //department.generateReports(); // error: department is not of type AccountingDepartment, cannot access generateReports


tsc --emit=jit example.ts


Department name: Accounting and Auditing
The Accounting Department meets each Monday at 10am.

Compile as JIT

tsc --emit=jit hello.ts

File hello.ts

function main() {
    print("Hello World!");


Hello World!

Compile as Binary Executable

On Windows

File tsc-compile.bat

rem set %LLVM% and %TSCBIN%
set LLVMPATH=C:\TypeScriptCompiler\3rdParty\llvm\release\bin
set TSCPATH=C:\TypeScriptCompiler\__build\tsc\bin
set LIBPATH="C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30037\lib\x64"
set SDKPATH="C:\Program Files (x86)\Windows Kits\10\Lib\10.0.18362.0\um\x64"
set UCRTPATH="C:\Program Files (x86)\Windows Kits\10\Lib\10.0.18362.0\ucrt\x64"
%TSCPATH%\tsc.exe --emit=jit -nogc -dump-object-file -object-filename=%FILENAME%.o %FILENAME%.ts
%LLVMPATH%\lld.exe -flavor link %FILENAME%.o /libpath:%LIBPATH% /libpath:%SDKPATH% /libpath:%UCRTPATH% /defaultlib:libcmt.lib libvcruntime.lib


tsc-compile.bat hello




Hello World!

On Linux (Ubuntu 20.04)

File tsc-compile.sh

./tsc --emit=jit -nogc -dump-object-file -object-filename=$1.o $1.ts
gcc -o $1 $1.o


sh -f tsc-compile.sh hello




Hello World!

Compiling as WASM

On Windows

File tsc-compile-wasm.bat

rem set %LLVM% and %TSCBIN%
set LLVMPATH=%LLVM%\llvm\release\bin
set TSCPATH=%TSCBIN%\tsc\bin
%TSCPATH%\tsc.exe --emit=llvm -nogc %FILENAME%.ts 2>%FILENAME%.ll
%LLVMPATH%\llc.exe -mtriple=wasm32-unknown-unknown -O3 --filetype=obj -o=%FILENAME%.o %FILENAME%.ll
%LLVMPATH%\wasm-ld.exe %FILENAME%.o -o %FILENAME%.wasm --no-entry --export-all --allow-undefined


tsc-compile-wasm.bat hello

Run run.html

<!DOCTYPE html>
    <script type="module">
let buffer;

const config = {
    env: {
        memory_base: 0,
        table_base: 0,
        memory : new WebAssembly.Memory({ initial: 256}),
        table: new WebAssembly.Table({
            initial: 0,
            element: 'anyfunc',

    .then(response =>{
        return response.arrayBuffer();
    .then(bytes => {
        return WebAssembly.instantiate(bytes, config); 
    .then(results => { 
       let { main } =  results.instance.exports;
       buffer = new Uint8Array(results.instance.exports.memory.buffer);


On Windows

First, precompile dependencies


To build TSC binaries:

cd tsc

On Linux (Ubuntu 20.04)

First, precompile dependencies

sh -f prepare_3rdParty.sh

To build TSC binaries:

cd tsc
sh -f config_tsc_debug.sh
sh -f build_tsc_debug.sh
  • How to support gc compile ?

    How to support gc compile ?

    I noticed that the readme.md compile with nogc? ./tsc --emit=jit -nogc -dump-object-file -object-filename=$1.o $1.ts

    do this support gc ? how to enable gc compile ?

    opened by lixiangsheng2018 8
  • Compilation error

    Compilation error

    I'm trying out this project (along with Microsoft's pxt) and the following raises a compilation error not implemented (ElementAccessExpression):

    /** Conveniently represents flow's "Maybe" type https://flow.org/en/docs/types/maybe/ */
    export type Maybe<T> = null | undefined | T;
    export interface Path {
      readonly prev: Path | undefined;
      readonly key: string | number;
      readonly typename: string | undefined;
     * Given a Path and a key, return a new Path containing the new key.
    export function addPath(
      prev: Readonly<Path> | undefined,
      key: string | number,
      typename: string | undefined,
    ): Path {
      return { prev, key, typename };
     * Given a Path, return an Array of the path keys.
    export function pathToArray(
      path: Maybe<Readonly<Path>>,
    ): Array<string | number> {
      const flattened = [];
      let curr = path;
      while (curr) {
        curr = curr.prev;
      return flattened;
    function main() {
        let pathArray = pathToArray({
            key: "path",
            prev: undefined,
            typename: undefined,
        for (let x of pathArray) {

    It would be great to know how far this project is compared to pxt when processing more complex TypeScript projects.

    Feel free to reach me at [email protected], we might be able to setup some sponsorship for this project!


    opened by syrusakbary 6
  • generate unexpected llvm ir

    generate unexpected llvm ir

    version: Release v0.0-pre-alpha6 code:

    function func() {
        throw "123";
    function main() {
        try {
        } catch {
    opened by ApsarasX 4
  • Integer types

    Integer types

    I started a project with this compiler in mind (although it won't be the only target) and I realized I will need integer types. I can't find any reference to integers in the repository. I will be using AssemblyScript's typedefs for now. If integer support is added I think it will be a good idea to use the same ones (i8, i16, i32, isize, u8, u16, u32, usize, f32, f64).

    opened by DiThi 3
  • `libTypeScriptRuntime.so.13git` not found in released tarball

    `libTypeScriptRuntime.so.13git` not found in released tarball

    I have downloaded the released tarball and decompressed it.

    It just like: image

    There is an invalid symbolic link for lack of libTypeScriptRuntime.so.13git

    opened by ApsarasX 2
  • More practical examples like connect to mysql/postgre database.

    More practical examples like connect to mysql/postgre database.

    Hello there.

    Your project is very nice. But i belive more practical and real world examples and tutorials like connect to database using libmysqlclient.so/libpg.so or libmysqlclient.a/libpg.a.

    opened by sirlordt 1
  • investigate: for/await  when having assert(v >= 1 && v <= 5); causes issue

    investigate: for/await when having assert(v >= 1 && v <= 5); causes issue

    function main() { let count = 0; for await (const v of [1, 2, 3, 4, 5]) { print(v); assert(v >= 1 && v <= 5); count++; }

    assert(count == 5);


    opened by ASDAlexander77 1
  • investigate: for/await sometimes not working due to GC enabled

    investigate: for/await sometimes not working due to GC enabled

    Exception thrown at 0x00007FFE5CBC1D01 (TypeScriptGCWrapper.dll) in tsc.exe: 0xC00000FD: Stack overflow (parameters: 0x0000000000000001, 0x0000008573443D10). The program '[52192] tsc.exe' has exited with code 0 (0x0).

    opened by ASDAlexander77 0
  • Support for Imports

    Support for Imports

    It would be great, if Typescript projects that are using the import syntax to import variables, functions, classes or types could be compiled with tsc.

    I tried the following:

    import x from "./x";

    And then tried to compile it, but it failed with "unknown statement type":

    ➜  tsc git:(main) ✗ ../__build/tsc-ninja/bin/tsc ../example.ts --emit=jit --nogc
    unknown statement type


    opened by syrusakbary 14
  • Investigate: loading second shared .so in Linux causes error

    Investigate: loading second shared .so in Linux causes error

    tsc --emit=jit --shared-libs=lib/libmlir_async_runti me.so,lib/libTypeScriptGCWrapper.so /tests/00print.ts

    Backtrace: __GI_raise ([email protected]=6) at ../sysdeps/unix/sysv/linux/raise.c:50 50 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) bt #0 __GI_raise ([email protected]=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x00007ffff7a2d859 in __GI_abort () at abort.c:79 #2 0x00007ffff78f5d5a in llvm::report_fatal_error(llvm::Twine const&, bool) () from /mnt/c/dev/__unix/TypeScriptCompiler/__build/tsc-ninja-release/test/tester/../../../../3rdParty/llvm-ninja/release/lib/libmlir_async_runtime.so #3 0x00007ffff78f5f2e in llvm::report_fatal_error(char const*, bool) () from /mnt/c/dev/__unix/TypeScriptCompiler/__build/tsc-ninja-release/test/tester/../../../../3rdParty/llvm-ninja/release/lib/libmlir_async_runtime.so #4 0x00007ffff7954f51 in (anonymous namespace)::CommandLineParser::addOption(llvm::cl::Opti

    opened by ASDAlexander77 0
Alex D
Alex D
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