(gdb) bt
#0  thr_kill () at thr_kill.S:4
#1  0x0000000815b4c0c8 in __raise (s=0x15b8f0b8) at /usr/src/lib/libc/gen/raise.c:52
#2  0x0000000815aa36f0 in abort () at /usr/src/lib/libc/stdlib/abort.c:67
#3  0x0000000013bb9d10 in llvm_unreachable_internal () at /usr/src/contrib/llvm-project/llvm/lib/Support/ErrorHandling.cpp:210
#4  0x000000001367bca8 in getVCmpInst () at /usr/src/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4029
#5  trySETCC () at /usr/src/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4136
#6  Select () at /usr/src/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4545
#7  0x00000000147cc754 in DoInstructionSelection () at /usr/src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1189
#8  0x00000000147cb300 in CodeGenAndEmitDAG () at /usr/src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:969
#9  0x00000000147c95f4 in SelectBasicBlock () at /usr/src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:736
#10 0x00000000147c8c34 in SelectAllBasicBlocks () at /usr/src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1606
#11 0x00000000147c53ac in runOnMachineFunction () at /usr/src/contrib/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:503
#12 0x00000000136714f0 in runOnMachineFunction () at /usr/src/contrib/llvm-project/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:154
#13 0x0000000014ada958 in runOnFunction () at /usr/src/contrib/llvm-project/llvm/lib/CodeGen/MachineFunctionPass.cpp:73
#14 0x00000000143c0f74 in runOnFunction () at /usr/src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1481
#15 0x00000000143c13d4 in runOnModule () at /usr/src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1517
#16 0x00000000143c1ba4 in runOnModule () at /usr/src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1582
#17 run () at /usr/src/contrib/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1694
#18 0x00000000110a9ea4 in EmitAssembly () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:912
#19 EmitBackendOutput () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/BackendUtil.cpp:1550
#20 0x00000000110a3654 in HandleTranslationUnit () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:335
#21 0x0000000011fe1834 in ParseAST () at /usr/src/contrib/llvm-project/clang/lib/Parse/ParseAST.cpp:171
#22 0x00000000117d1b08 in ExecuteAction () at /usr/src/contrib/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1043
#23 0x00000000110a1080 in ExecuteAction () at /usr/src/contrib/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1179
#24 0x00000000117d10fc in Execute () at /usr/src/contrib/llvm-project/clang/lib/Frontend/FrontendAction.cpp:936
#25 0x0000000012ca7c30 in ExecuteAction () at /usr/src/contrib/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:965
#26 0x0000000011057e7c in ExecuteCompilerInvocation () at /usr/src/contrib/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:290
#27 0x000000001104661c in cc1_main () at /usr/src/contrib/llvm-project/clang/tools/driver/cc1_main.cpp:240
#28 0x0000000011055400 in ExecuteCC1Tool () at /usr/src/contrib/llvm-project/clang/tools/driver/driver.cpp:328
#29 0x0000000011055034 in main () at /usr/src/contrib/llvm-project/clang/tools/driver/driver.cpp:402