[LLVMbugs] [Bug 12218] New: llvm hangs in JumpThreading::runOnFunction

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12218

             Bug #: 12218
           Summary: llvm hangs in JumpThreading::runOnFunction
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: kcc at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8166
  --> http://llvm.org/bugs/attachment.cgi?id=8166
clang_hang.c

Reproduce: r152415, x86_64 linux
% clang clang_hang.c -w -O2 -c
<runs forever>

Profile:
    88.73%            clang  clang                 [.]
llvm::Instruction::setParent(llvm::BasicBlock*)
                      |
                      --- llvm::Instruction::setParent(llvm::BasicBlock*)
                         |          
                          --100.00%-- (anonymous
namespace)::JumpThreading::runOnFunction(llvm::Function&)
                                   
llvm::FPPassManager::runOnFunction(llvm::Function&)
                                    (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&)
                                   
llvm::MPPassManager::runOnModule(llvm::Module&)
                                    llvm::PassManagerImpl::run(llvm::Module&)

The test case was generated by csmith (http://embed.cs.utah.edu/csmith/)

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