merge strings created by

const NSConstantString *appKey =  @"MyApp";

llvm-svn: 123680

clang/lib/CodeGen/CodeGenModule.cpp

@@ -1681,6 +1681,7 @@ CodeGenModule::GetAddrOfConstantString(const StringLiteral *Literal) {
   llvm::GlobalVariable *GV =
   new llvm::GlobalVariable(getModule(), C->getType(), isConstant, Linkage, C,
                            ".str");
+  GV->setUnnamedAddr(true);
   if (isUTF16) {
     CharUnits Align = getContext().getTypeAlignInChars(getContext().ShortTy);
     GV->setAlignment(Align.getQuantity());