[LLVMdev] Creating and implementing an analysis group out of tree

[John Criswell]

On 6/12/14, 3:46 PM, Jeremy Salwen wrote:
> Hi Eli,
>
> Thanks for the link! I'm able to compile a standalone pass outside of 
> the source tree, and I'm obviously ably to compile analysis groups 
> inside the source tree.  However, the problem comes when I try to do 
> what the tutorial suggests to create an analysis group outside of the 
> source tree.
>
> My understanding is that building out of tree requires different 
> methods to register the passes.  For example, the class RegisterPass, 
> which the tutorial instructs you to use (and is used by sample 
> repository you linked), never shows up in the source tree.  Likewise 
> for RegisterAnalysisGroup. Furthermore I've found that just copying 
> the way it's done in the source tree and not using RegisterPass causes 
> opt to not recognize your command-line arguments.
>
> Do you know of any other projects that will demonstrate how to build 
> passes out of tree, only creating an analysis group as well?

The poolalloc and SAFECode projects have analysis groups.  For 
directions on downloading the code, please see 
http://sva.cs.illinois.edu/docs/Install.html.

Regards,

John Criswell

>
> Thanks
> Jeremy
>
>
> On Thu, Jun 12, 2014 at 4:20 PM, Eli Bendersky <eliben at google.com 
> <mailto:eliben at google.com>> wrote:
>
>
>
>
>     On Thu, Jun 12, 2014 at 1:10 PM, Jeremy Salwen
>     <jeremysalwen at gmail.com <mailto:jeremysalwen at gmail.com>> wrote:
>
>         Hello all,
>
>         I'm trying to follow the guide
>         http://llvm.org/docs/WritingAnLLVMPass.html to build an some
>         passes and analysis groups out of tree. However, I'm having
>         some trouble with crashes when I try to follow the guide.
>         The first section provides a very useful example of what the
>         whole .cpp file should look like for the HelloWorld pass.
>         Obviously it's a bit more complex to write the whole setup
>         with an analysis group, an analysis pass, and a transform pass
>         that uses the analysis, but example code would be extremely
>         helpful, and could serve as a good starting point for anyone
>         who wants to do something similar.  Is there anywhere i could
>         find such example code, perhaps as part of a project, that
>         demonstrates how to define and use an analysis group out of tree?
>
>
>     It's not entirely clear which part you're having a problem with.
>     If it's creating an analysis group, there should be samples within
>     the LLVM source code. If it's building out-of-tree, take a look at
>     https://github.com/eliben/llvm-clang-samples -- it's a repository
>     with a bunch of LLVM/Clang samples, all built out of tree. It
>     keeps pretty close track to ToT, as well as having branches for
>     prior releases (3.3 and 3.4, for now).
>
>     Eli
>
>
>
>
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