David Majnemer 35ab328e94 CodeGen: Correct linkage of thread_local for OS X ...

The backing store of thread local variables is internal for OS X and all
accesses must go through the thread wrapper.

However, individual TUs may have inlined through the thread wrapper.
To fix this, give the thread wrapper functions WeakAnyLinkage.  This
prevents them from getting inlined into call-sites.

This fixes PR19989.

llvm-svn: 210632

2014-06-11 04:08:55 +00:00

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