Extended Description

I'm getting this glibc detected failure:
/proj/llvm/llvm-3/Debug/bin/opt: malloc(): memory corruption: 0x08de9f1c

Occurring at:

llvm::DenseMapllvm::DominatorTreeBase::Node*,llvm::Value*::grow()+0x34
llvm::DenseMapllvm::DominatorTreeBase::Node*,llvm::Value*::InsertIntoBucket(llvm::DominatorTreeBase::Node*
const&, llvm::Value* const&, std::pair<llvm::DominatorTreeBase::Node*,
llvm::Value*>)
llvm::DenseMapllvm::DominatorTreeBase::Node*,llvm::Value*::operator[](llvm::DominatorTreeBase::Node
const&)
(anonymous
namespace)::LCSSA::GetValueForBlock(llvm::DominatorTreeBase::Node*,llvm::Instruction*,
llvm::DenseMap<llvm::DominatorTreeBase::Node*, llvm::Value*>&)
(anonymous
namespace)::LCSSA::ProcessInstruction(llvm::Instruction*,std::vector<llvm::BasicBlock*,
std::allocatorllvm::BasicBlock* > const&)
(anonymous namespace)::LCSSA::visitSubloop(llvm::Loop*)
(anonymous namespace)::LCSSA::visitSubloop(llvm::Loop*)
(anonymous namespace)::LCSSA::runOnFunction(llvm::Function&)
llvm::FPPassManager::runOnFunction(llvm::Function&)
CGPassManager::runOnModule(llvm::Module&)
llvm::MPPassManager::runOnModule(llvm::Module&)
llvm::PassManagerImpl::run(llvm::Module&)
llvm::PassManager::run(llvm::Module&)
main