[llvm-dev] Registering passes on a module

[Philip Pfaffe via llvm-dev]

Hi Matthieu,

You need to set up the different types of AnalysisManagers as well, just as
you did with ModuleAM. Then, you need to cross register them with each
other by calling `passBuilder.crossRegisterProxies`.

Cheers,
Philip

On Sat, Jul 21, 2018 at 9:13 PM Matthieu Brucher via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi all,
>
> I'm trying to build passes with the PassBuilder to optimize the result of
> MCJIT (I assume, this is a requirement for performance).
>
> So I do this:
>     llvm::PassBuilder passBuilder;
>     llvm::ModulePassManager modulePassManager =
> passBuilder.buildPerModuleDefaultPipeline(llvm::PassBuilder::OptimizationLevel::O3);
>     llvm::ModuleAnalysisManager moduleAnalysisManager;
>     passBuilder.registerModuleAnalyses(moduleAnalysisManager);
>     modulePassManager.run(*module, moduleAnalysisManager);
>
> with module being a pointer to an LLVM module.
> Unfortunately, the moduleAnalysisManager has only the module passes, but
> not the function ones that are wrapped with the proxy class. Is there
> anything I missed or a up-to-date tutorial on this?
> I couldn't find an answer on Stackoverflow (where a similar question was
> asked).
>
> Cheers,
>
> Matthieu
> --
> Quantitative analyst, Ph.D.
> Blog: http://blog.audio-tk.com/
> LinkedIn: http://www.linkedin.com/in/matthieubrucher
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