Reid Kleckner 6bb26dafa4 [Support] Fix a race initializing a static local in MSVC ...

static local initialization isn't thread safe with MSVC and a race was
reported in PR23817. We can't use std::atomic because it's not trivially
constructible, so instead do some lame volatile global integer
manipulation.

llvm-svn: 239566

2015-06-11 22:22:45 +00:00

7.4 KiB

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