(gdb)  bt
#0  0x00007f852b45e110 in std::__detail::_List_node_base::_M_hook(std::__detail::_List_node_base*) () from /lib64/libstdc++.so.6
#1  0x00007f852638b656 in std::list<vISA::G4_BB_SB*, std::allocator<vISA::G4_BB_SB*> >::_M_insert<vISA::G4_BB_SB* const&> (this=0xb0, __position=...) at /opt/rh/devtoolset-9/root/usr/include/c++/9/bits/allocated_ptr.h:70
#2  std::list<vISA::G4_BB_SB*, std::allocator<vISA::G4_BB_SB*> >::push_back (__x=<synthetic pointer>: <optimized out>, this=0xb0) at /opt/rh/devtoolset-9/root/usr/include/c++/9/bits/stl_list.h:1208
#3  vISA::SWSB::addSIMDEdge (this=0x7fff417b42d0, succ=0x0, pred=0x42e2a9a8) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/LocalScheduler/SWSB_G4IR.cpp:537
#4  vISA::SWSB::SWSBBuildSIMDCFG (this=this@entry=0x7fff417b42d0) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/LocalScheduler/SWSB_G4IR.cpp:567
#5  0x00007f852639f87a in vISA::SWSB::SWSBGlobalTokenGenerator (this=this@entry=0x7fff417b42d0, p=..., LB=..., globalSendsLB=...) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/LocalScheduler/SWSB_G4IR.cpp:889
#6  0x00007f85263a0273 in vISA::SWSB::SWSBGenerator (this=this@entry=0x7fff417b42d0) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/LocalScheduler/SWSB_G4IR.cpp:1274
#7  0x00007f852630e333 in vISA::Optimizer::addSWSBInfo (this=0x7fff417b4610) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/Optimizer.cpp:746
#8  0x00007f85262f4e54 in vISA::Optimizer::runPass (this=this@entry=0x7fff417b4610, Index=Index@entry=vISA::Optimizer::PI_addSWSBInfo) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/Optimizer.cpp:1484
#9  0x00007f85262f730d in vISA::Optimizer::optimization (this=this@entry=0x7fff417b4610) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/Optimizer.cpp:2212
#10 0x00007f852616f31e in VISAKernelImpl::compileTillOptimize (this=this@entry=0x150f0ec0) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/VISAKernelImpl.cpp:239
#11 0x00007f852616f3e6 in VISAKernelImpl::compileFastPath (this=this@entry=0x150f0ec0) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/VISAKernelImpl.cpp:161
#12 0x00007f852626aded in CISA_IR_Builder::Compile (this=0x7be7830, nameInput=nameInput@entry=0x7f852842c711 "", os=os@entry=0x0, emit_visa_only=emit_visa_only@entry=false)
    at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/BuildCISAIRImpl.cpp:1632
#13 0x00007f852602ff0f in IGC::CEncoder::Compile (this=0x150efcc8, hasSymbolTable=<optimized out>) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/Compiler/CISACodeGen/CISABuilder.cpp:5994
#14 0x00007f85260a5da6 in IGC::EmitPass::runOnFunction (this=0xe7ec0a0, F=...) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/Compiler/CISACodeGen/EmitVISAPass.cpp:1215
#15 0x00007f8526971cc7 in llvm::FPPassManager::runOnFunction(llvm::Function&) () from /root/blender-git/build_linux/deps/Release/igc//lib/libigc.so.1
#16 0x00007f85269728e3 in llvm::FPPassManager::runOnModule(llvm::Module&) () from /root/blender-git/build_linux/deps/Release/igc//lib/libigc.so.1
#17 0x00007f8526970f90 in llvm::legacy::PassManagerImpl::run(llvm::Module&) () from /root/blender-git/build_linux/deps/Release/igc//lib/libigc.so.1
#18 0x00007f8525e005cd in IGC::CodeGen<IGC::OpenCLProgramContext> (ctx=ctx@entry=0x7fff417b6210, kernels=...) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/Compiler/CISACodeGen/ShaderCodeGen.cpp:1688
#19 0x00007f8525e00b25 in IGC::CodeGen (ctx=ctx@entry=0x7fff417b6210, shaders=...) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/Compiler/CISACodeGen/ShaderCodeGen.cpp:1786
#20 0x00007f8525dc9de6 in IGC::CodeGen (ctx=ctx@entry=0x7fff417b6210) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/Compiler/CISACodeGen/OpenCLKernelCodeGen.cpp:2468
#21 0x00007f8525c23361 in TC::TranslateBuildSPMD (pInputArgs=pInputArgs@entry=0x7fff417b7860, pOutputArgs=pOutputArgs@entry=0x7fff417b77c0, inputDataFormatTemp=inputDataFormatTemp@entry=TC::TB_DATA_FORMAT_SPIR_V, IGCPlatform=...,
    profilingTimerResolution=profilingTimerResolution@entry=83.3330002, inputShHash=...) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/AdaptorOCL/dllInterfaceCompute.cpp:1297
#22 0x00007f8525d2bc2b in IGC::VLD::TranslateBuildSPMDAndESIMD (pInputArgs=0x7fff417b7860, pOutputArgs=0x7fff417b77c0, inputDataFormatTemp=TC::TB_DATA_FORMAT_SPIR_V, IGCPlatform=..., profilingTimerResolution=83.3330002,
    inputShHash=..., errorMessage="") at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/VISALinkerDriver/VLD.cpp:173
#23 0x00007f8525c25cb5 in TC::TranslateBuild (pInputArgs=pInputArgs@entry=0x7fff417b7860, pOutputArgs=pOutputArgs@entry=0x7fff417b77c0, inputDataFormatTemp=<optimized out>, IGCPlatform=..., profilingTimerResolution=83.3330002)
    at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/AdaptorOCL/dllInterfaceCompute.cpp:1481
#24 0x00007f8525d12066 in IGC::IgcOclTranslationCtx<0ul>::Impl::Translate (this=<optimized out>, outVersion=<optimized out>, src=<optimized out>, specConstantsIds=specConstantsIds@entry=0x0,
    specConstantsValues=specConstantsValues@entry=0x0, options=options@entry=0x26bc0d0, internalOptions=<optimized out>, tracingOptions=<optimized out>, tracingOptionsCount=<optimized out>, gtPinInput=<optimized out>)
    at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/AdaptorOCL/ocl_igc_interface/impl/igc_ocl_translation_ctx_impl.h:336
#25 0x00007f8525d1444f in IGC::IgcOclTranslationCtx<1ul>::TranslateImpl (this=<optimized out>, outVersion=<optimized out>, src=<optimized out>, options=0x26bc0d0, internalOptions=0x26bc160, tracingOptions=0x0, tracingOptionsCount=0)
    at /root/blender-git/build_linux/deps/build/igc/src/external_igc/IGC/AdaptorOCL/ocl_igc_interface/igc_ocl_translation_ctx.h:27
#26 0x00007f852bc8b52e in NEO::OfflineCompiler::buildSourceCode() () from /root/blender-git/build_linux/deps/Release/ocloc//lib/libocloc.so
#27 0x00007f852bc8fe25 in NEO::OfflineCompiler::build() () from /root/blender-git/build_linux/deps/Release/ocloc//lib/libocloc.so
#28 0x00007f852bcc61d9 in int SafetyGuardLinux::call<int, NEO::OfflineCompiler, int (NEO::OfflineCompiler::*)()>(NEO::OfflineCompiler*, int (NEO::OfflineCompiler::*)(), int) ()
   from /root/blender-git/build_linux/deps/Release/ocloc//lib/libocloc.so
#29 0x00007f852bcc5f0d in buildWithSafetyGuard(NEO::OfflineCompiler*) () from /root/blender-git/build_linux/deps/Release/ocloc//lib/libocloc.so
#30 0x00007f852bc6dc48 in oclocInvoke () from /root/blender-git/build_linux/deps/Release/ocloc//lib/libocloc.so
#31 0x0000000000400713 in main ()
(gdb) frame 3
#3  vISA::SWSB::addSIMDEdge (this=0x7fff417b42d0, succ=0x0, pred=0x42e2a9a8) at /root/blender-git/build_linux/deps/build/igc/src/external_igc/visa/LocalScheduler/SWSB_G4IR.cpp:537
537         succ->Preds.push_back(pred);
(gdb) list
532     }
533
534     void SWSB::addSIMDEdge(G4_BB_SB* pred, G4_BB_SB* succ)
535     {
536         pred->Succs.push_back(succ);
537         succ->Preds.push_back(pred);
538     }
539
540     // Build SIMD CFG for the global WAR dependence tracking
541     // 1. When building CFG, except the backedge, all using JIP branch edge.