[LLVMbugs] [Bug 363] NEW: Loop unroller breaks on the attached code

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=363

           Summary: Loop unroller breaks on the attached code
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: criswell at uiuc.edu


The loop unroller optimization breaks on the attached test case:

llvm-as -f -o file.bc file.ll
opt file.bc -loop-unroll
WARNING: It looks like you're attempting to print out a bytecode file.  I'm
going to pretend you didn't ask me to do this (for your own good).  If you
REALLY want to taste LLVM bytecode first hand, you can force output with the
'-f' option.

opt[0x8631376]
opt[0x8631596]
opt[0x42029188]
opt(bool llvm::isa_impl<llvm::Instruction, llvm::Value>(llvm::Value
const&)+0x11)[0x83d8bc7]
opt(llvm::isa_impl_wrap<llvm::Instruction, llvm::Value const, llvm::Value
const>::doit(llvm::Value const&)+0x11)[0x83d8b39]
opt(bool llvm::isa_impl_cl<llvm::Value>::isa<llvm::Instruction>(llvm::Value
const&)+0x11)[0x83d8b23]
opt(bool llvm::isa_impl_cl<llvm::Value
const>::isa<llvm::Instruction>(llvm::Value const&)+0x11)[0x83d8b0d]
opt(bool llvm::isa_impl_cl<llvm::Value
const*>::isa<llvm::Instruction>(llvm::Value const*)+0x11)[0x83d8af7]
opt(bool llvm::isa<llvm::Instruction, llvm::Value const*>(llvm::Value const*
const&)+0x13)[0x83d8ae1]
opt(llvm::SetCondInst::classof(llvm::Value const*)+0x18)[0x845acf4]
opt(bool llvm::isa_impl<llvm::SetCondInst, llvm::Value>(llvm::Value
const&)+0x11)[0x8459947]
opt(llvm::isa_impl_wrap<llvm::SetCondInst, llvm::Value const, llvm::Value
const>::doit(llvm::Value const&)+0x11)[0x8459931]
opt(bool llvm::isa_impl_cl<llvm::Value>::isa<llvm::SetCondInst>(llvm::Value
const&)+0x11)[0x845991b]
opt(bool
llvm::isa_impl_cl<llvm::Value*>::isa<llvm::SetCondInst>(llvm::Value*)+0x11)[0x8459905]
opt(bool llvm::isa<llvm::SetCondInst, llvm::Value*>(llvm::Value*
const&)+0x13)[0x84598ef]
opt(llvm::cast_retty<llvm::SetCondInst, llvm::Value*>::ret_type
llvm::dyn_cast<llvm::SetCondInst, llvm::Value*>(llvm::Value*)+0x11)[0x84569ef]
opt(llvm::Loop::getTripCount() const+0xb5)[0x85425ab]
opt((anonymous namespace)::LoopUnroll::visitLoop(llvm::Loop*)+0x181)[0x843b177]
opt((anonymous
namespace)::LoopUnroll::runOnFunction(llvm::Function&)+0xec)[0x843ae8a]
opt(llvm::PassManagerTraits<llvm::Function>::runPass(llvm::FunctionPass*,
llvm::Function*)+0x1f)[0x860efcb]
opt(llvm::PassManagerT<llvm::Function>::runOnUnit(llvm::Function*)+0x5e1)[0x86051ef]
opt(llvm::PassManagerTraits<llvm::Function>::runOnFunction(llvm::Function&)+0x1f)[0x8605dc3]
opt(llvm::FunctionPass::run(llvm::Module&)+0xa7)[0x85c47e3]
opt(llvm::PassManagerTraits<llvm::Module>::runPass(llvm::Pass*,
llvm::Module*)+0x1f)[0x860f061]
opt(llvm::PassManagerT<llvm::Module>::runOnUnit(llvm::Module*)+0x5e1)[0x860334f]
opt(llvm::PassManagerTraits<llvm::Module>::run(llvm::Module&)+0x1f)[0x86049f1]
opt(llvm::PassManager::run(llvm::Module&)+0x23)[0x85c3ca7]
opt(main+0x924)[0x83af9b4]
opt(__libc_start_main+0x95)[0x42017589]
opt(std::basic_ostream<char, std::char_traits<char> >& std::operator<<
<std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&,
char)+0x5d)[0x83aefe1]
Segmentation fault (core dumped)



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