Benjamin Kramer 108515eb03 [ManagedStatic] Reimplement double-checked locking with std::atomic. ... This gets rid of the memory fence in the hot path (dereferencing the ManagedStatic), trading for an extra mutex lock in the cold path (when the ManagedStatic was uninitialized). Since this only happens on the first accesses it shouldn't matter much. On strict architectures like x86 this removes any atomic instructions from the hot path. Also remove the tsan annotations, tsan knows how standard atomics work so they should be unnecessary now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274131 91177308-0d34-0410-b5e6-96231b3b80d8		2016-06-29 15:04:07 +00:00
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llvm	[ManagedStatic] Reimplement double-checked locking with std::atomic.	2016-06-29 15:04:07 +00:00
llvm-c	Add support for string attributes in the C API.	2016-06-15 17:50:39 +00:00