[llvm-dev] Orc JIT v1 Deprecation

Praveen Velliengiri via llvm-dev llvm-dev at lists.llvm.org
Wed May 15 10:52:24 PDT 2019

Hi Alex
Sorry for late reply

The New ORC APIs support concurrent compilation.
I'm not aware of any migration guide to ORC v2 from v1. But there is a
in-tree classes called LLJIT and LLLazyJIT which is an example for using
new ORC APIs.
You can also take a look at "Updating ORC for Concurrency" talk by lang
hames, the talk explains about the new APIs. I hope discussions about JIT
is generally available in LLVM-dev mailing lists.

For documentation kaleidoscope, I don't think the updated version is
available yet.  And I personally hope APIs are stable enough, and also
there is an effort to add speculation to JIT which modify the internals to
support that but APIs will mostly be the same, but not sure there may be a
some changes in future.

Also CC'ing Lang Hames for more insights


On Mon, 13 May 2019 at 13:52, Alex Denisov via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi folks,
> Rather by accident than on purpose I looked at the release notes and found
> the following:
> http://releases.llvm.org/8.0.0/docs/ReleaseNotes.html#changes-to-the-jit-apis
> TL;DR: Orc v1 is deprecated and will be removed in the next release.
> I have several questions in this regard:
> 1. Is there a migration guide I can use to update my code to the new
> version?
> 2. Is there any development plan for this part of LLVM? So far I have
> feeling that it's a closed source development.
> 3. Is there some communication channels I am missing to follow? I follow
> dev&commits mailing lists and present on IRC once in a while, but I somehow
> missed the message about the Orc v1 removal.
> Also, the release notes mention that Orc v2 is the recommended way for the
> new projects, but:
> 1. Is there a documentation?
> 2. How stable the APIs are?
> Thank you,
> Alex.
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
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