Fixes the Atomic implementation if compiled by MSVC compiler.
sys::cas_flag should be long on this platform, InterlockedAdd() is
defined only for the Itanium architecture (according to MSDN).
Patch by Michael Beck!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90748 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Atomic.cpp b/lib/System/Atomic.cpp
index f9b55a1..7ba8b77 100644
--- a/lib/System/Atomic.cpp
+++ b/lib/System/Atomic.cpp
@@ -85,7 +85,7 @@
#elif defined(__GNUC__)
return __sync_add_and_fetch(ptr, val);
#elif defined(_MSC_VER)
- return InterlockedAdd(ptr, val);
+ return InterlockedExchangeAdd(ptr, val) + val;
#else
# error No atomic add implementation for your platform!
#endif