[llvm-dev] Error: Verify if there is a pass dependency cycle

[Qiuping Yi via llvm-dev]

Yes, I forgot to initialize my pass. Thank you very much.


Best regards,

Qiuping Yi
Institute Of Software
Chinese Academy of Sciences

On Sat, Apr 14, 2018 at 12:57 AM, Alexandre Isoard <
alexandre.isoard at gmail.com> wrote:

> Hi,
>
> You need to initialize your pass with:
>
> INITIALIZE_PASS_BEGIN(YourPass, "your-pass", "Your Pass",
> /*cfgonly=*/false, /*analysis=*/false)
> INITIALIZE_PASS_DEPENDENCY(PostDominatorTreeWrapperPass)
> INITIALIZE_PASS_END(YourPass, "your-pass", "Your Pass", /*cfgonly=*/false,
> /*analysis=*/false)
>
> So as to both register your pass, and have PostDominatorTreeWrapperPass
> (which is the Analysis pass in charge of creating the PostDominatorTree)
> initialized before your pass.
>
> It also give a pretty name to YourPass: "Your Pass"
> And add an option to opt to run it: "-your-pass"
>
>
> On Wed, Apr 11, 2018 at 9:39 PM, Qiuping Yi via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi everyone,
>>
>> I write a new FunctionPass which wants to use pass PostDominatorTree, so
>> I
>> implement the next function:
>>
>> void getAnalysisUsage(AnalysisUsage &AU) const {
>>       AU.addRequired<PostDominatorTree>();
>>       AU.setPreservesAll();
>> }
>>
>> Then I get PDT through the next statement:
>>
>> PostDominatorTree *PDT = &getAnalysis<PostDominatorTree>();
>>
>> My code can be successfully compiled. However, I encounter the next error
>> when I ran the code:
>>
>> *Pass 'Unnamed pass: implement Pass::getPassName()' is not initialized.*
>> *Verify if there is a pass dependency cycle.*
>> *Required Passes:*
>>
>> I used llvm-3.4. Any comments are welcome. Thanks!
>>
>>
>> Best regards,
>>
>> Qiuping Yi
>> Institute Of Software
>> Chinese Academy of Sciences
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
>
> --
> *Alexandre Isoard*
>
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