I've been searching for a while now, but I could not find any engine that emits LLVM bytecode. But somehow I cannot belief there is no such engine :)
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IIRC mozilla investigated the possibility of using LLVM as a backend for their JIT but ruled it out, saying it would be too slow or something like that – CAFxX Dec 11 '11 at 21:11
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@CAFxX: Do you have any reference about that? – Albert Mar 04 '14 at 14:24
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3@Albert sure: https://hacks.mozilla.org/2009/07/tracemonkey-overview/comment-page-2/#comment-67629 – CAFxX Mar 05 '14 at 16:59
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2[LLV8](https://github.com/ispras/llv8) is an experimental top-tier compiler for V8 JavaScript Engine. LLV8 leverages the power of LLVM MCJIT to produce highly optimized code. last commit was on Sep 8, 2016. – Wis Jan 15 '18 at 20:35
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JXcore will be your best bet going forward IMHO - when they convert from V8 to LLVM, which is an objective of theirs when they reach version 2 (according to their roadmap), it will then compile your javascript sources into native code.
You can get more info on JXcore here.
This part of the answer is in a response to Albert's answer:
According to ktrzeciaknubisa's post they will publish the source as soon as they are out of the beta stages and have clean code...this might take some time.
Laurens Holst
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WitHeld
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Looks like it has now been replaced by this project: https://github.com/janeasystems/nodejs-mobile – Matt Browne Jun 19 '20 at 22:33
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...although it looks like `nodejs-mobile` is using V8, so I guess we still have to look to earlier projects for examples of targeting LLVM. – Matt Browne Jun 19 '20 at 22:49
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It appears Webkit now includes this functionality as of May 2014:
... the WebKit project has unified its existing JavaScript compilation infrastructure with the state-of-the-art LLVM optimizer.
https://webkit.org/blog/3362/introducing-the-webkit-ftl-jit/
The code for this seems to be here:
Johann
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1They've since replaced LLVM with the Bare Bones Backend. https://webkit.org/blog/5852/introducing-the-b3-jit-compiler/ – David Braun Jan 10 '17 at 19:34
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There doesn't seem to be any.
In the list of projects build with LLVM there is nothing about Javascript.
Guffa
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JXCore (a fork of Nodejs) claims to have implemented that. Since Feb 2015, it is open source, the code is here on GitHub.
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Where is it stated, that JXcore is a commercial fork? In the contrary - it is an open source project https://github.com/jxcore/jxcore (starting from mid of Feb 2015, but was never commercial though) – infografnet Mar 23 '15 at 16:39
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But they moved that to "somewhere down the road" and use V8 and SpiderMonkey now – Josef Mar 25 '15 at 16:59