[llvm-dev] Preparing BOLT for LLVM monorepo

Christian Kühnel via llvm-dev
Wed, 03 Nov 2021 08:50:30 -0000

Hi Maksim,

there are a couple of things to do from the infrastructure perspective. So
I started a ticket with the (probably incomplete) list of things to do:
https://github.com/llvm/llvm-iwg/issues/80

Feel free to add more comments/tasks there.

Best,
Christian


On Tue, Nov 2, 2021 at 9:53 PM Maksim Panchenko via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi All,
>
>
>
> Since the acceptance of the "BOLT framework for binary analysis,
>
> transformation, and optimization" RFC
>
> (https://lists.llvm.org/pipermail/llvm-dev/2020-October/145902.html),
>
> we've been working on addressing the feedback and getting ready for
>
> inclusion into the monorepo. We've cleaned up interfaces with core LLVM
>
> libraries, refactored our codebase to match LLVM coding standards, and
>
> added more open-source tests. Additionally, we've made BOLT faster and
>
> more compact.
>
>
>
> As of this writing, BOLT could be built as a separate project in the
>
> LLVM monorepo without any patches other than build configuration
>
> changes. You can view the latest sources at the monorepo fork
>
> https://github.com/facebookincubator/BOLT, under "/bolt".
>
>
>
> During the past year, we were happy to see an ever-growing inflow of
>
> pull requests from external contributors. We believe that accelerating
>
> the monorepo integration will streamline the open-source review process
>
> and make it more transparent.
>
>
>
> While we are finishing the final steps before the integration
>
> (https://github.com/facebookincubator/BOLT/issues/248), we would like to
>
> hear from the community and address any remaining concerns. If
>
> everything goes smoothly, we anticipate the merge to happen early next
>
> month and in time for LLVM 14 release.
>
>
>
> We are still working on finalizing the exact logistics of the merge.
>
> However, we expect to follow the Flang project's footsteps and run the
>
> "--no-ff" merge to preserve the history of ~1K commits. We would
like to
>
> ask for help and coordination from the release managers Tom Stellard and
>
> Hans Wennborg.
>
>
>
> We haven't made the final decision on including BOLT in
>
> LLVM_ALL_PROJECTS, but we are ready to make BOLT the default project in
>
> the initial merge commit. Currently, we do not support building on
>
> Windows; thus, the project will be automatically disabled with the
>
> warning when building on unsupported platforms. As we anticipate the
>
> increased load on buildbots, we would like to know how we can help with
>
> adding more build machines. Please let us know!
>
>
>
> Thank you,
>
> Maksim and BOLT Team
> _______________________________________________
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>
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