wesm commented on pull request #7396: URL: https://github.com/apache/arrow/pull/7396#issuecomment-649102716
I used perf to record some data about the hung function ``` + 83.37% 0.00% gandiva-decimal [unknown] [.] 0xffffffffffffffff + 65.62% 5.27% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::SelectionDAG::Combine + 62.50% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::SelectionDAGISel::CodeGenAndEmitDAG + 57.88% 0.04% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::SelectionDAGISel::SelectAllBasicBlocks + 55.57% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::SelectionDAGISel::runOnMachineFunction + 54.60% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::MachineFunctionPass::runOnFunction + 53.48% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction + 46.62% 0.07% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::FPPassManager::runOnFunction + 45.75% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::legacy::PassManagerImpl::run + 41.41% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::FPPassManager::runOnModule + 39.79% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::MCJIT::emitObject + 39.75% 2.28% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::DAGCombiner::combine + 30.20% 3.51% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::DAGCombiner::visit + 16.76% 6.80% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::TargetLowering::SimplifyDemandedVectorElts + 16.22% 0.54% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::DAGCombiner::SimplifyDemandedVectorElts + 15.57% 0.11% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::DAGCombiner::SimplifyDemandedVectorElts + 10.84% 1.95% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::SelectionDAGLegalize::LegalizeOp + 10.23% 4.51% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::X86TargetLowering::SimplifyDemandedVectorEltsForTargetNode + 8.64% 1.48% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::DAGCombiner::recursivelyDeleteUnusedNodes + 8.23% 0.25% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::X86TargetLowering::LowerOperation + 8.17% 1.55% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::X86TargetLowering::PerformDAGCombine + 7.59% 6.43% gandiva-decimal libgandiva.so.100.0.0 [.] (anonymous namespace)::DAGCombiner::AddToWorklist + 7.10% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] gandiva::Projector::Make + 6.93% 1.23% gandiva-decimal libgandiva.so.100.0.0 [.] LowerVSETCC + 6.90% 0.14% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::X86TargetLowering::LowerSETCC + 6.68% 1.30% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::SelectionDAG::getNode + 6.27% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] gandiva::Engine::FinalizeModule + 6.13% 0.58% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::TargetLowering::SimplifySetCC + 6.02% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] gandiva::LLVMGenerator::Build + 5.81% 0.00% gandiva-decimal libgandiva.so.100.0.0 [.] gandiva::Projector::Make + 5.45% 0.90% gandiva-decimal libgandiva.so.100.0.0 [.] llvm::SelectionDAG::LegalizeOp ``` It looks like an LLVM bug based on Googling for "llvm::SelectionDAG::Combine hang" ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
