Index: llvm/trunk/lib/Transforms/Instrumentation/AddressSanitizer.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ llvm/trunk/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -1605,7 +1605,8 @@
     Constant *ODRIndicator = ConstantExpr::getNullValue(IRB.getInt8PtrTy());
     GlobalValue *InstrumentedGlobal = NewGlobal;
 
-    bool CanUsePrivateAliases = TargetTriple.isOSBinFormatELF();
+    bool CanUsePrivateAliases =
+        TargetTriple.isOSBinFormatELF() || TargetTriple.isOSBinFormatMachO();
     if (CanUsePrivateAliases && ClUsePrivateAliasForGlobals) {
       // Create local alias for NewGlobal to avoid crash on ODR between
       // instrumented and non-instrumented libraries.