Add llvm_start_multithreaded(), which starts up the LLVM internals in thread-safe mode.  Provide double-check locking
initialization of ManagedStatic's when running in thread-safe mode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72151 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed