[llvm-bugs] [Bug 33636] New: SEGV in llvm::APInt::getZExtValue

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33636

            Bug ID: 33636
           Summary: SEGV in llvm::APInt::getZExtValue
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: PowerPC
          Assignee: unassignedbugs at nondot.org
          Reporter: anton at samba.org
                CC: echristo at gmail.com, hfinkel at anl.gov,
                    kbarton at linux.vnet.ibm.com, llvm-bugs at lists.llvm.org,
                    nemanja.i.ibm at gmail.com

Created attachment 18730
  --> https://bugs.llvm.org/attachment.cgi?id=18730&action=edit
Test case

I'm seeing quite a few SEGVs in llvm::APInt::getZExtValue when running csmith.
Testcase attached.

# llc bugpoint-reduced-simplified.ll

#0 0x000000002826ea44 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/home/anton/llvm/lib/Support/Unix/Signals.inc:398:0
#1 0x000000002826eb70 PrintStackTraceSignalHandler(void*)
/home/anton/llvm/lib/Support/Unix/Signals.inc:461:0
#2 0x000000002826c75c llvm::sys::RunSignalHandlers()
/home/anton/llvm/lib/Support/Signals.cpp:50:0
#3 0x000000002826c924 SignalHandler(int)
/home/anton/llvm/lib/Support/Unix/Signals.inc:242:0
#4 0x00003fff834104d8  0x4d8 llvm::APInt::getZExtValue() const
#5 0x00003fff834104d8 /home/anton/llvm/include/llvm/ADT/APInt.h:1539:0
llvm::ConstantInt::getZExtValue() const
#6 0x00003fff834104d8 /home/anton/llvm/include/llvm/IR/Constants.h:150:0
llvm::ConstantSDNode::getZExtValue() const
#7 0x00003fff834104d8
/home/anton/llvm/include/llvm/CodeGen/SelectionDAGNodes.h:1431:0 foldBoolExts
#8 0x00003fff834104d8
/home/anton/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4047:0 (anonymous
namespace)::PPCDAGToDAGISel::PreprocessISelDAG()
#9 0x00003fff834104d8
/home/anton/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4079:0 
#10 0x00003fff834104d8 operator()
/home/anton/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4034:0
#11 0x00003fff834104d8 foldBoolExts
/home/anton/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4040:0
#12 0x00003fff834104d8 (anonymous
namespace)::PPCDAGToDAGISel::PreprocessISelDAG()
/home/anton/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:4079:0
#13 0x00000000276698f4 llvm::SelectionDAGISel::DoInstructionSelection()
/home/anton/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:922:0
#14 0x00000000276698b8 llvm::SelectionDAGISel::CodeGenAndEmitDAG()
/home/anton/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:847:0
#15 0x0000000028126694
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction,
false, false, void>, false, true>,
llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, false,
false, void>, false, true>, bool&)
/home/anton/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:660:0
#16 0x000000002812de44
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
/home/anton/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1599:0
#17 0x000000002812e2ec
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&)
/home/anton/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:466:0
#18 0x0000000028133328 (anonymous
namespace)::PPCDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&)
/home/anton/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:125:0
#19 0x000000002813567c
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
/home/anton/llvm/lib/CodeGen/MachineFunctionPass.cpp:62:0
#20 0x0000000027671178 llvm::FPPassManager::runOnFunction(llvm::Function&)
/home/anton/llvm/lib/IR/LegacyPassManager.cpp:1519:0
#21 0x00000000279f8d2c llvm::FPPassManager::runOnModule(llvm::Module&)
/home/anton/llvm/lib/IR/LegacyPassManager.cpp:1540:0
#22 0x0000000027d0714c runOnModule
/home/anton/llvm/lib/IR/LegacyPassManager.cpp:1596:0
#23 0x0000000027d0714c llvm::legacy::PassManagerImpl::run(llvm::Module&)
/home/anton/llvm/lib/IR/LegacyPassManager.cpp:1699:0
#24 0x0000000027d07268 llvm::legacy::PassManager::run(llvm::Module&)
/home/anton/llvm/lib/IR/LegacyPassManager.cpp:1730:0
#25 0x0000000027d07fb4 compileModule(char**, llvm::LLVMContext&)
/home/anton/llvm/tools/llc/llc.cpp:609:0
#26 0x0000000027d0823c main /home/anton/llvm/tools/llc/llc.cpp:350:0
#27 0x000000002761eaa8 generic_start_main
/build/glibc-I4GUKU/glibc-2.24/csu/../csu/libc-start.c:291:0
#28 0x00000000275dbfd8 __libc_start_main
/build/glibc-I4GUKU/glibc-2.24/csu/../sysdeps/unix/sysv/linux/powerpc/libc-start.c:116:0

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