[LLVMdev] Regarding a pass in LLVM

[Devang Patel]

Ambika,

Please read http://llvm.org/docs/WritingAnLLVMPass.html .
-
Devang

On Tue, Feb 23, 2010 at 9:08 AM, ambika <ambika at cse.iitb.ac.in> wrote:
> I have done that. I have defined createMyAnaPass() in Passes.h and it is
> defined in MyAna.cpp and used in LinkAllPasses.h
>
> But still the error :
>
> /home/ambika/llvm/llvm-obj/tools/opt/Release/opt.o: In function `global
> constructors keyed to opt.cpp':
> opt.cpp:(.text+0x1e89): undefined reference to `llvm::createMyAnaPass()'
>
>
> I dont understand whats the problem.
>
>
> Jianzhou Zhao wrote:
>> On Tue, Feb 23, 2010 at 7:17 AM, ambika <ambika at cse.iitb.ac.in> wrote:
>>
>>> Thanks that helped me out.
>>> But now I am facing one more problem. It says :
>>>
>>> ‘llvm::ModulePass* llvm::createMyAnaPass()’ should have been declared
>>> inside ‘llvm’
>>>
>>> but I can find no place to declare it.
>>> Where should I do it.
>>>
>>
>> We can do what scalar optimizations do.
>>
>> All scalar passes are declared in include/llvm/Transforms/Scalar.h and
>> include/llvm-c/Transforms/Scalar.h,
>> defined in lib/Transforms/Scalar.cpp, and used in include/llvm/LinkAllPasses.h.
>>
>> Jianzhou
>>
>>
>>> John Criswell wrote:
>>>
>>>> ambika at cse.iitb.ac.in wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I am trying to add a pass inn LLVM, and I actually want to add it in
>>>>> source code, not just directly into object code.
>>>>>
>>>>> For that I included the lines in my file MyAna.cpp
>>>>> (llvm-2.6/lib/ana/MyAna.cpp)
>>>>>
>>>>>
>>>>> char MyAna::ID = 0;
>>>>> static RegisterPass<MyAna> X("my-aa","My Analysis");
>>>>> static RegisterAnalysisGroup<AliasAnalysis> Y(X);
>>>>>
>>>>> ModulePass *llvm::createMyAnaPass() { return new MyAna(); }
>>>>>
>>>>>
>>>>> I also included createMyAnaPass() in Passes.h and LinkAllPasses.h
>>>>> But when I do make I get the following error :
>>>>>
>>>>> /home/ambika/llvm/llvm-obj/tools/opt/Release/opt.o: In function `global
>>>>> constructors keyed to opt.cpp':
>>>>> opt.cpp:(.text+0x1e89): undefined reference to `llvm::createMyAnaPass()'
>>>>>
>>>>>
>>>>> Am I missing out something.
>>>>>
>>>> Have you modified the Makefile in tools/opt to link in the library
>>>> containing your pass? Your pass doesn't appear to be placed in
>>>> libAnalysis or libTransform, so you'll need to modify the opt Makefile
>>>> to link in whatever your library's name is.
>>>>
>>>> -- John T.
>>>>
>>>>
>>>>> Please help me.
>>>>>
>>>>> thanks and regards,
>>>>> Ambika
>>>>>
>>>>> _______________________________________________
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>>>>>
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>
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-- 
-
Devang