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

[Qiuping Yi via llvm-dev]

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
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