[PATCH] D155406: [MemCpyOpt] implement multi BB stack-move optimization

Sat Aug 26 15:48:11 PDT 2023

khei4 added a comment.

https://lab.llvm.org/buildbot/#/builders/36/builds/37042

Hmm, seems like the assertion failed somehow. (Is this due to the DominatorTree update is forgotten on somewhere?)

   gh -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/Object/CMakeFiles/LLVMObject.dir/MachOObjectFile.cpp.o -MF lib/Object/CMakeFiles/LLVMObject.dir/MachOObjectFile.cpp.o.d -o lib/Object/CMakeFiles/LLVMObject.dir/MachOObjectFile.cpp.o -c /home/buildbots/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/lib/Object/MachOObjectFile.cpp
  clang++: /home/buildbots/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/llvm/include/llvm/Support/GenericDomTree.h:500: NodeT* llvm::DominatorTreeBase<NodeT, IsPostDom>::findNearestCommonDominator(NodeT*, NodeT*) const [with NodeT = llvm::BasicBlock; bool IsPostDom = false]: Assertion `NodeA && "A must be in the tree"' failed.
  ...
   #6 0x00007fffbaeddc90 __assert_fail_base (/lib64/libc.so.6+0x3dc90)
   #7 0x00007fffbaeddd34 __assert_fail (/lib64/libc.so.6+0x3dd34)
   #8 0x00000000131ae08c llvm::DominatorTreeBase<llvm::BasicBlock, false>::findNearestCommonDominator(llvm::BasicBlock*, llvm::BasicBlock*) const (/home/buildbots/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/install/stage1/bin/clang+++0x131ae08c)
   #9 0x0000000017b08920 llvm::MemCpyOptPass::performStackMoveOptzn(llvm::Instruction*, llvm::Instruction*, llvm::AllocaInst*, llvm::AllocaInst*, unsigned long, llvm::BatchAAResults&)::'lambda0'(llvm::Instruction*, llvm::function_ref<bool (llvm::Instruction*)>)::operator()(llvm::Instruction*, llvm::function_ref<bool (llvm::Instruction*)>) const MemCpyOptimizer.cpp:0:0
  #10 0x0000000017b09308 llvm::MemCpyOptPass::performStackMoveOptzn(llvm::Instruction*, llvm::Instruction*, llvm::AllocaInst*, llvm::AllocaInst*, unsigned long,

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