Fariborz Jahanian d1b6778e69 Objective-C IRGen. Use llvm::WeakVH ...

for caching couple of global symbols used
for generation of CF/NS string meta-data
so they are not released prematuely in certain
corner cases. // rdar:// 13598026.
Reviewed by John M.

llvm-svn: 179599

2013-04-16 15:25:39 +00:00

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