[llvm-dev] Confusing ERROR with LoopAccessLegacyAnalysis: Pass 'Unnamed pass: implement Pass::getPassName()' is not initialized. (original) (raw)

Tingyuan LIANG via llvm-dev llvm-dev at lists.llvm.org
Sun Feb 3 05:07:04 PST 2019

Dear Michael,

Thanks a lot for your suggestion but I not sure whether it is caused by this initialization because for example, I do not do such initialization for LoopInfoWrapperPass in my code but it works fine.

I tried your solution for the pass but got the following compilation error ----> namespace "llvm" has no member "initializeLoopInformationCollectPass".

Such error is raised from the macro define: INITIALIZE_PASS_END. Does it mean I need to specially define such function in the LLVM namespace?

Thanks again for your time and patience!

Best regards,

Tingyuan LIANG MPhil Student Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology

From: Michael Kruse <llvmdev at meinersbur.de> Sent: Saturday, February 2, 2019 6:10 AM To: Tingyuan LIANG Cc: llvm-dev at lists.llvm.org Subject: Re: [llvm-dev] Confusing ERROR with LoopAccessLegacyAnalysis: Pass 'Unnamed pass: implement Pass::getPassName()' is not initialized.

Hi,

you will have to call initializeLoopAccessLegacyAnalysisPass(*PassRegistry::getPassRegistry()) before you can use it as a pass dependency. This is usually done by a sequence of

INITIALIZE_PASS_BEGIN(YourPass, "your_pass", "Your Pass Name", false, false) INITIALIZE_PASS_DEPENDENCY(LoopAccessLegacyAnalysis) INITIALIZE_PASS_END(YourPass, "your_pass", "Your Pass Name", false, false)

which also creates an initializer for your pass: initializeYourPassPass which you should call in some way in your application.

Michael

Am Fr., 1. Feb. 2019 um 12:58 Uhr schrieb Tingyuan LIANG via llvm-dev <llvm-dev at lists.llvm.org>:

Dear all, I write a new LoopPass which wants to use passes including LoopInfoWrapperPass, ScalarEvolutionWrapperPass and LoopAccessLegacyAnalysis. Therefore, I implement the following code based on LLVM 9.0.0: ===================================================================== bool LoopInformationCollect::runOnLoop(Loop *L, LPPassManager &) { auto &SE = getAnalysis().getSE(); auto &LI = getAnalysis().getLoopInfo(); // auto *LAA = &getAnalysis(); if (Loopid.find(L)==Loopid.end()) // traverse instructions in the block assign instruction ID { Loopid[L] = ++LoopCounter; } // *Loopout << "---------------Loop report----------------\n";_ _// *Loopout << LAA->getInfo(L).getReport(); return false; } char LoopInformationCollect::ID = 0; void LoopInformationCollect::getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired(); AU.addRequired(); AU.addRequired(); AU.setPreservesAll(); } ===================================================================== I can make the project with GNU make successfully but get the error "Pass 'Unnamed pass: implement Pass::getPassName()' is not initialized." during runtime. When I remove the line "AU.addRequired();" and make the project again, I run the program successfully. Detailed error report is shown below: --------------------------------------------------------------------------------------------------------- Pass 'Unnamed pass: implement Pass::getPassName()' is not initialized. Verify if there is a pass dependency cycle. Required Passes: Natural Loop Information Scalar Evolution Analysis --------------------------------------------------------------------------------------------------------- Please note that I am not using "opt" in the terminal to run the passes but utilize PassManager in a main() function. It seems that the problem is caused by "LoopAccessLegacyAnalysis", since I have not faced this problem with other passes. I am wondering how I can fix this situation. Thanks a lot for your time and suggestions! Best regards, ------------------------------------------ Tingyuan LIANG MPhil Student Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology

LLVM Developers mailing list llvm-dev at lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20190203/c3795118/attachment.html>

More information about the llvm-dev mailing list