[llvm-bugs] [Bug 26081] New: Assertion failed: (BitWidth == RHS.BitWidth && "Comparison requires equal bit widths"), function operator==

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https://llvm.org/bugs/show_bug.cgi?id=26081

            Bug ID: 26081
           Summary: Assertion failed: (BitWidth == RHS.BitWidth &&
                    "Comparison requires equal bit widths"), function
                    operator==
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: andrew at fubar.geek.nz
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15594
  --> https://llvm.org/bugs/attachment.cgi?id=15594&action=edit
Minimised test case

I'm hitting the following when building the attached test case with clang 3.8:

Assertion failed: (BitWidth == RHS.BitWidth && "Comparison requires equal bit
widths"), function operator==, file
/home/at718/freebsd/lib/clang/libllvmselectiondag/../../../contrib/llvm/include/llvm/ADT/APInt.h,
line 978.

I'm building with:

cc -cc1 -triple aarch64-unknown-freebsd11.0 -emit-obj csqrt_test-cc283e.c

The stack trace is:

#0  0x00000000021c87e9 in handle_signal ()
#1  0x00000000021c83e9 in thr_sighandler ()
#2  <signal handler called>
#3  0x000000000223014a in thr_kill ()
#4  0x000000000227cd09 in abort ()
#5  0x0000000002263aaa in __assert ()
#6  0x00000000017e7d75 in (anonymous
namespace)::SelectionDAGLegalize::ExpandNode ()
#7  0x00000000017da6ae in (anonymous
namespace)::SelectionDAGLegalize::LegalizeOp ()
#8  0x00000000017d9ad2 in llvm::SelectionDAG::Legalize ()
#9  0x000000000173ad5c in llvm::SelectionDAGISel::CodeGenAndEmitDAG ()
#10 0x0000000001739f0f in llvm::SelectionDAGISel::SelectAllBasicBlocks ()
#11 0x000000000173773c in llvm::SelectionDAGISel::runOnMachineFunction ()
#12 0x0000000001b1817a in llvm::MachineFunctionPass::runOnFunction ()
#13 0x00000000020292fb in llvm::FPPassManager::runOnFunction ()
#14 0x000000000202952b in llvm::FPPassManager::runOnModule ()
#15 0x0000000002029999 in llvm::legacy::PassManagerImpl::run ()
#16 0x000000000066b35a in clang::EmitBackendOutput ()
#17 0x0000000000668e5f in clang::BackendConsumer::HandleTranslationUnit ()
#18 0x0000000000866275 in clang::ParseAST ()
#19 0x00000000006673cc in clang::CodeGenAction::ExecuteAction ()
#20 0x0000000000442bbb in clang::FrontendAction::Execute ()
#21 0x0000000000466b41 in clang::CompilerInstance::ExecuteAction ()
#22 0x000000000040aed7 in clang::ExecuteCompilerInvocation ()
#23 0x0000000000400872 in cc1_main ()
#24 0x0000000000408ee7 in main ()

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