llvm dev - Feb 2016 - Writing an LLVM Pass that depends on mem2reg

Hello,

I am used to specifying dependence on other LLVM passes in the
`getAnalysisUsage(AnalysisUsage &)` method of my pass. However, it
doesn't
seem that there is a header file that exposes the `mem2reg` pass - it is
implemented in `Mem2Reg.cpp` as a wrapper.

Is there an easy way to reuse this pass, or should I, in essence, duplicate
`Mem2Reg.cpp` in my project?

Cheers,
 - Stan
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> On Feb 11, 2016, at 9:49 AM, Stanislav Manilov via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Hello,
> 
> I am used to specifying dependence on other LLVM passes in the
`getAnalysisUsage(AnalysisUsage &)` method of my pass. However, it
doesn't seem that there is a header file that exposes the `mem2reg` pass -
it is implemented in `Mem2Reg.cpp` as a wrapper.
Usually dependencies are expressed toward *analyses* and not toward other
transformations.

It is the responsibility of the pass pipeline building to order transformations.

(hope I haven't misunderstood your question)

-- 
Mehdi

> 
> Is there an easy way to reuse this pass, or should I, in essence, duplicate
`Mem2Reg.cpp` in my project?
> 
> Cheers,
>  - Stan
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

Oh, I see, that makes a lot of sense.

How do I build the pass pipeline?

On Thu, Feb 11, 2016 at 5:54 PM, Mehdi Amini <mehdi.amini at apple.com>
wrote:
> > On Feb 11, 2016, at 9:49 AM, Stanislav Manilov via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >
> > Hello,
> >
> > I am used to specifying dependence on other LLVM passes in the
> `getAnalysisUsage(AnalysisUsage &)` method of my pass. However, it
doesn't
> seem that there is a header file that exposes the `mem2reg` pass - it is
> implemented in `Mem2Reg.cpp` as a wrapper.
>
> Usually dependencies are expressed toward *analyses* and not toward other
> transformations.
>
> It is the responsibility of the pass pipeline building to order
> transformations.
>
> (hope I haven't misunderstood your question)
>
> --
> Mehdi
>
>
> >
> > Is there an easy way to reuse this pass, or should I, in essence,
> duplicate `Mem2Reg.cpp` in my project?
> >
> > Cheers,
> >  - Stan
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
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