[llvm-bugs] [Bug 35985] New: [AArch64] AArch64DAGToDAGISel::SelectPostLoadLane hits invalid cast

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35985

            Bug ID: 35985
           Summary: [AArch64] AArch64DAGToDAGISel::SelectPostLoadLane hits
                    invalid cast
           Product: new-bugs
           Version: 5.0
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: serge.guelton at telecom-bretagne.eu
                CC: llvm-bugs at lists.llvm.org

Created attachment 19695
  --> https://bugs.llvm.org/attachment.cgi?id=19695&action=edit
input, reduced minimal test case

The reduced .ll file, when compiled with

> ./bin/clang -cc1 -triple aarch64--linux-android -emit-obj buggy-4.ll

hits the following traceback:

#0 0x00007fbdcc61d43f llvm::sys::PrintStackTrace(llvm::raw_ostream&)
.../_build/../lib/Support/Unix/Signals.inc:398:13
#1 0x00007fbdcc61d746 bool __gnu_cxx::operator!=<std::pair<void (*)(void*),
void*>*, std::vector<std::pair<void (*)(void*), void*>,
std::allocator<std::pair<void (*)(void*), void*> > >
>(__gnu_cxx::__normal_iterator<std::pair<void (*)(void*), void*>*,
std::vector<std::pair<void (*)(void*), void*>, std::allocator<std::pair<void
(*)(void*), void*> > > > const&, __gnu_cxx::__normal_iterator<std::pair<void
(*)(void*), void*>*, std::vector<std::pair<void (*)(void*), void*>,
std::allocator<std::pair<void (*)(void*), void*> > > > const&)
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_iterator.h:883:27
#2 0x00007fbdcc61d746 llvm::sys::RunSignalHandlers()
.../_build/../lib/Support/Signals.cpp:49:0
#3 0x00007fbdcc61d746 SignalHandler(int)
.../_build/../lib/Support/Unix/Signals.inc:242:0
#4 0x00007fbdcbca8160 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12160)
#5 0x00007fbdc987b6a0 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x346a0)
#6 0x00007fbdc987ccf7 abort (/lib/x86_64-linux-gnu/libc.so.6+0x35cf7)
#7 0x00007fbdc9873fca (/lib/x86_64-linux-gnu/libc.so.6+0x2cfca)
#8 0x00007fbdc9874042 (/lib/x86_64-linux-gnu/libc.so.6+0x2d042)
#9 0x00007fbddb19f439 llvm::APInt::getZExtValue() const
.../_build/../include/llvm/ADT/APInt.h:1545:5
#10 0x00007fbddb19f439 llvm::ConstantInt::getZExtValue() const
.../_build/../include/llvm/IR/Constants.h:150:0
#11 0x00007fbddb19f439 llvm::ConstantSDNode::getZExtValue() const
.../_build/../include/llvm/CodeGen/SelectionDAGNodes.h:1437:0
#12 0x00007fbddb19f439 (anonymous
namespace)::AArch64DAGToDAGISel::SelectPostLoadLane(llvm::SDNode*, unsigned
int, unsigned int)
.../_build/../lib/Target/AArch64/AArch64ISelDAGToDAG.cpp:1382:0
#13 0x00007fbdc903c49a llvm::SelectionDAGISel::DoInstructionSelection()
.../_build/../lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:944:28
#14 0x00007fbdc903b99d llvm::TimeRegion::~TimeRegion()
.../_build/../include/llvm/Support/Timer.h:152:9
#15 0x00007fbdc903b99d llvm::SelectionDAGISel::CodeGenAndEmitDAG()
.../_build/../lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:848:0
#16 0x00007fbdc90391cf
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
.../_build/../lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1609:11
#17 0x00007fbdc90361d6
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&)
.../_build/../lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:467:7
#18 0x00007fbdce6e1604
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
.../_build/../lib/CodeGen/MachineFunctionPass.cpp:62:13
#19 0x00007fbdce14902f llvm::FPPassManager::runOnFunction(llvm::Function&)
.../_build/../lib/IR/LegacyPassManager.cpp:1514:27
#20 0x00007fbdce149283 llvm::FPPassManager::runOnModule(llvm::Module&)
.../_build/../lib/IR/LegacyPassManager.cpp:1535:13
#21 0x00007fbdce149779 (anonymous
namespace)::MPPassManager::runOnModule(llvm::Module&)
.../_build/../lib/IR/LegacyPassManager.cpp:1591:27
#22 0x00007fbdce149779 llvm::legacy::PassManagerImpl::run(llvm::Module&)
.../_build/../lib/IR/LegacyPassManager.cpp:1694:0

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