[PATCH] ubsan: Port runtime library to (32- and 64-bit) Windows.

[Peter Collingbourne]

================
Comment at: lib/sanitizer_common/sanitizer_common.h:662-665
@@ -661,4 +661,6 @@
 #if _MSC_VER
+#ifndef _WIN64
   // FIXME: make sure this is actually enough.
   __asm;
+#endif
 #else
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majnemer wrote:
> This could probably be _ReadWriteBarrier();
I think it can; done.

http://reviews.llvm.org/D10856

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