Index: lib/CodeGen/ItaniumCXXABI.cpp
===================================================================
--- lib/CodeGen/ItaniumCXXABI.cpp
+++ lib/CodeGen/ItaniumCXXABI.cpp
@@ -2399,8 +2399,10 @@
       CGM.SetLLVMFunctionAttributes(nullptr, FI, cast<llvm::Function>(Init));
     }
 
-    if (Init)
+    if (Init) {
       Init->setVisibility(Var->getVisibility());
+      Init->setDSOLocal(Var->isDSOLocal());
+    }
 
     llvm::LLVMContext &Context = CGM.getModule().getContext();
     llvm::BasicBlock *Entry = llvm::BasicBlock::Create(Context, "", Wrapper);
Index: test/CodeGenCXX/runtime-dllstorage.cpp
===================================================================
--- test/CodeGenCXX/runtime-dllstorage.cpp
+++ test/CodeGenCXX/runtime-dllstorage.cpp
@@ -114,6 +114,7 @@
 // CHECK-MS-DAG: declare void @_Init_thread_header(i32*)
 // CHECK-MS-DAG: declare void @_Init_thread_footer(i32*)
 
+// CHECK-IA-DAG: @_ZTH1t = dso_local alias void (), void ()* @__tls_init
 // CHECK-IA-DAG: declare i32 @__gxx_personality_v0(...)
 // CHECK-IA-DAG: define linkonce_odr hidden void @__clang_call_terminate(i8*)