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I'm not sure what LLVM_ENABLE_THREADS impacts - whether it is LLVM executables themselves or LLVM-generated code - but it seems to be on by default on the Windows CMake build (I'm building LLVM+Clang at trunk head using CMake/Visual Studio 2013 Win64). But 3 unit tests in IR, which are compiled only if define LLVM_ENABLE_THREADS is set, fail if LLVM_ENABLE_THEADS=ON:

Hi, A feature I've wanted in lit for a while is a having a timeout per test. Attached are patches that implement this idea. I'm e-mailing llvm-dev rather than llvm-commits because I want to gather more feedback on my initial implementation and hopefully some answers to some unresolved issues with my implementation. Currently in lit you can set a global timeout for all of the tests but