Index: lib/Transforms/Instrumentation/SanitizerCoverage.cpp
===================================================================
--- lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -382,6 +382,8 @@
           {IRB.CreatePointerCast(SecStart, Int32PtrTy),
             IRB.CreatePointerCast(SecEnd, Int32PtrTy)});
 
+      CtorFunc->setComdat(M.getOrInsertComdat(SanCovModuleCtorName));
+
       appendToGlobalCtors(M, CtorFunc, SanCtorAndDtorPriority);
     }
   } else if (!Options.TracePC) {