Copy dll storage in copyAttributes.

llvm-svn: 201295
diff --git a/llvm/lib/IR/Globals.cpp b/llvm/lib/IR/Globals.cpp
index 4d8b9ce..a70ea0f 100644
--- a/llvm/lib/IR/Globals.cpp
+++ b/llvm/lib/IR/Globals.cpp
@@ -53,6 +53,7 @@
   setSection(Src->getSection());
   setVisibility(Src->getVisibility());
   setUnnamedAddr(Src->hasUnnamedAddr());
+  setDLLStorageClass(Src->getDLLStorageClass());
 }
 
 void GlobalValue::setAlignment(unsigned Align) {