From de089d462ca0d23fa2c3406d427431cdc850b2e5 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 17 Jan 2011 22:11:21 +0000
Subject: [PATCH] merge strings created by const NSConstantString *appKey = 
 @"MyApp";

llvm-svn: 123680
---
 clang/lib/CodeGen/CodeGenModule.cpp          | 1 +
 clang/test/CodeGenObjC/ns-constant-strings.m | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 8ae31f775092..0564372a4e5d 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/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());
diff --git a/clang/test/CodeGenObjC/ns-constant-strings.m b/clang/test/CodeGenObjC/ns-constant-strings.m
index 3ef5f558422c..389132bd05ee 100644
--- a/clang/test/CodeGenObjC/ns-constant-strings.m
+++ b/clang/test/CodeGenObjC/ns-constant-strings.m
@@ -31,3 +31,9 @@ int main() {
 
 // CHECK-FRAGILE: @_NSConstantStringClassReference = external global
 // CHECK-NONFRAGILE: @"OBJC_CLASS_$_NSConstantString" = external global
+
+// CHECK-FRAGILE: @.str = private unnamed_addr constant [6 x i8] c"MyApp\00"
+// CHECK-FRAGILE: @.str1 = private unnamed_addr constant [7 x i8] c"MyApp1\00"
+
+// CHECK-NONFRAGILE: @.str = private unnamed_addr constant [6 x i8] c"MyApp\00"
+// CHECK-NONFRAGILE: @.str1 = private unnamed_addr constant [7 x i8] c"MyApp1\00"