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8640c6a522
Use the new `llvm_gcov_init' function to register the writeout and flush functions. The initialization function will also call `atexit' for some cleanups and final writout calls. But it does this only once. This is better than checking for the `main' function, because in a library that function may not exist. <rdar://problem/12439551> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177579 91177308-0d34-0410-b5e6-96231b3b80d8
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