diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 1376164..f582238 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -1749,9 +1749,12 @@
       llvm::ConstantArray::get(CGM.getLLVMContext(), str, false);
 
   // Create a global variable for this string
-  return new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant,
-                                  llvm::GlobalValue::PrivateLinkage,
-                                  C, GlobalName);
+  llvm::GlobalVariable *GV =
+    new llvm::GlobalVariable(CGM.getModule(), C->getType(), constant,
+                             llvm::GlobalValue::PrivateLinkage,
+                             C, GlobalName);
+  GV->setUnnamedAddr(true);
+  return GV;
 }
 
 /// GetAddrOfConstantString - Returns a pointer to a character array
diff --git a/test/CodeGen/blocksignature.c b/test/CodeGen/blocksignature.c
index 6ed8750..26f2048 100644
--- a/test/CodeGen/blocksignature.c
+++ b/test/CodeGen/blocksignature.c
@@ -1,14 +1,14 @@
 // RUN: %clang_cc1 -fblocks -triple x86_64-apple-darwin9 %s -emit-llvm -o - | FileCheck %s -check-prefix=X64
 // RUN: %clang_cc1 -fblocks -triple i686-apple-darwin9 %s -emit-llvm -o - | FileCheck %s -check-prefix=X32
 
-// X64: @.str = private constant [6 x i8] c"v8@?0\00" 
+// X64: @.str = private unnamed_addr constant [6 x i8] c"v8@?0\00" 
 // X64: @__block_literal_global = internal constant %1 { i8** @_NSConcreteGlobalBlock, i32 1342177280,
-// X64: @.str1 = private constant [12 x i8] c"i16@?0c8f12\00"
+// X64: @.str1 = private unnamed_addr constant [12 x i8] c"i16@?0c8f12\00"
 // X64:   store i32 1073741824, i32*
 
-// X32: @.str = private constant [6 x i8] c"v4@?0\00" 
+// X32: @.str = private unnamed_addr constant [6 x i8] c"v4@?0\00" 
 // X32: @__block_literal_global = internal constant %1 { i8** @_NSConcreteGlobalBlock, i32 1342177280,
-// X32: @.str1 = private constant [11 x i8] c"i12@?0c4f8\00"
+// X32: @.str1 = private unnamed_addr constant [11 x i8] c"i12@?0c4f8\00"
 // X32:   store i32 1073741824, i32*
 
 // rdar://7635294
diff --git a/test/CodeGen/const-init.c b/test/CodeGen/const-init.c
index ac26b65..32b762d 100644
--- a/test/CodeGen/const-init.c
+++ b/test/CodeGen/const-init.c
@@ -118,7 +118,7 @@
 struct g23 g24 = {1,2,3,4};
 
 // CHECK: @g25.g26 = internal global i8* getelementptr inbounds ([4 x i8]* @__func__.g25, i32 0, i32 0)
-// CHECK: @__func__.g25 = private constant [4 x i8] c"g25\00"
+// CHECK: @__func__.g25 = private unnamed_addr constant [4 x i8] c"g25\00"
 int g25() {
   static const char *g26 = __func__;
   return *g26;
diff --git a/test/CodeGen/darwin-string-literals.c b/test/CodeGen/darwin-string-literals.c
index 8734295..d605cc0 100644
--- a/test/CodeGen/darwin-string-literals.c
+++ b/test/CodeGen/darwin-string-literals.c
@@ -1,12 +1,12 @@
 // RUN: %clang_cc1 -triple i386-apple-darwin9 -emit-llvm %s -o - | FileCheck -check-prefix LSB %s
 
-// CHECK-LSB: @.str = private constant [8 x i8] c"string0\00"
+// CHECK-LSB: @.str = private unnamed_addr constant [8 x i8] c"string0\00"
 // CHECK-LSB: @.str1 = private constant [8 x i8] c"string1\00"
 // CHECK-LSB: @.str2 = internal constant [36 x i8] c"h\00e\00l\00l\00o\00 \00\92! \00\03& \00\90! \00w\00o\00r\00l\00d\00\00\00", align 2
 
 // RUN: %clang_cc1 -triple powerpc-apple-darwin9 -emit-llvm %s -o - | FileCheck -check-prefix MSB %s
 
-// CHECK-MSB: @.str = private constant [8 x i8] c"string0\00"
+// CHECK-MSB: @.str = private unnamed_addr constant [8 x i8] c"string0\00"
 // CHECK-MSB: @.str1 = private constant [8 x i8] c"string1\00"
 // CHECK-MSB: @.str2 = internal constant [36 x i8] c"\00h\00e\00l\00l\00o\00 !\92\00 &\03\00 !\90\00 \00w\00o\00r\00l\00d\00\00", align 2
 
diff --git a/test/CodeGen/func-in-block.c b/test/CodeGen/func-in-block.c
index 7e65ff9..1900135 100644
--- a/test/CodeGen/func-in-block.c
+++ b/test/CodeGen/func-in-block.c
@@ -15,5 +15,5 @@
     return 0; // not reached
 }
 
-// CHECK: @__func__.__main_block_invoke_0 = private constant [22 x i8] c"__main_block_invoke_0\00"
+// CHECK: @__func__.__main_block_invoke_0 = private unnamed_addr constant [22 x i8] c"__main_block_invoke_0\00"
 // CHECK: call void @PRINTF({{.*}}@__func__.__main_block_invoke_ 
diff --git a/test/CodeGen/predefined-expr.c b/test/CodeGen/predefined-expr.c
index 9be5754..e2826b6 100644
--- a/test/CodeGen/predefined-expr.c
+++ b/test/CodeGen/predefined-expr.c
@@ -1,13 +1,13 @@
 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
 
-// CHECK: @__func__.plainFunction = private constant [14 x i8] c"plainFunction\00"
-// CHECK: @__PRETTY_FUNCTION__.plainFunction = private constant [21 x i8] c"void plainFunction()\00"
-// CHECK: @__func__.externFunction = private constant [15 x i8] c"externFunction\00"
-// CHECK: @__PRETTY_FUNCTION__.externFunction = private constant [22 x i8] c"void externFunction()\00"
-// CHECK: @__func__.privateExternFunction = private constant [22 x i8] c"privateExternFunction\00"
-// CHECK: @__PRETTY_FUNCTION__.privateExternFunction = private constant [29 x i8] c"void privateExternFunction()\00"
-// CHECK: @__func__.staticFunction = private constant [15 x i8] c"staticFunction\00"
-// CHECK: @__PRETTY_FUNCTION__.staticFunction = private constant [22 x i8] c"void staticFunction()\00"
+// CHECK: @__func__.plainFunction = private unnamed_addr constant [14 x i8] c"plainFunction\00"
+// CHECK: @__PRETTY_FUNCTION__.plainFunction = private unnamed_addr constant [21 x i8] c"void plainFunction()\00"
+// CHECK: @__func__.externFunction = private unnamed_addr constant [15 x i8] c"externFunction\00"
+// CHECK: @__PRETTY_FUNCTION__.externFunction = private unnamed_addr constant [22 x i8] c"void externFunction()\00"
+// CHECK: @__func__.privateExternFunction = private unnamed_addr constant [22 x i8] c"privateExternFunction\00"
+// CHECK: @__PRETTY_FUNCTION__.privateExternFunction = private unnamed_addr constant [29 x i8] c"void privateExternFunction()\00"
+// CHECK: @__func__.staticFunction = private unnamed_addr constant [15 x i8] c"staticFunction\00"
+// CHECK: @__PRETTY_FUNCTION__.staticFunction = private unnamed_addr constant [22 x i8] c"void staticFunction()\00"
 
 int printf(const char *, ...);
 
diff --git a/test/CodeGen/string-literal-short-wstring.c b/test/CodeGen/string-literal-short-wstring.c
index be1f1dd..8c2e412 100644
--- a/test/CodeGen/string-literal-short-wstring.c
+++ b/test/CodeGen/string-literal-short-wstring.c
@@ -6,11 +6,11 @@
   // CHECK: internal constant [10 x i8] c"\E1\84\A0\C8\A0\F4\82\80\B0\00", align 1
   char b[10] = "\u1120\u0220\U00102030";
 
-  // CHECK: private constant [6 x i8] c"A\00B\00\00\00"
+  // CHECK: private unnamed_addr constant [6 x i8] c"A\00B\00\00\00"
   const wchar_t *foo = L"AB";
 
   // This should convert to utf16.
-  // CHECK: private constant [10 x i8] c" \11 \02\C8\DB0\DC\00\00"
+  // CHECK: private unnamed_addr constant [10 x i8] c" \11 \02\C8\DB0\DC\00\00"
   const wchar_t *bar = L"\u1120\u0220\U00102030";
 
 
diff --git a/test/CodeGen/string-literal.c b/test/CodeGen/string-literal.c
index 43bfc21..6d02b0f 100644
--- a/test/CodeGen/string-literal.c
+++ b/test/CodeGen/string-literal.c
@@ -8,9 +8,9 @@
   // CHECK: internal constant [10 x i8] c"\E1\84\A0\C8\A0\F4\82\80\B0\00", align 1
   char b[10] = "\u1120\u0220\U00102030";
 
-  // CHECK: private constant [12 x i8] c"A\00\00\00B\00\00\00\00\00\00\00"
+  // CHECK: private unnamed_addr constant [12 x i8] c"A\00\00\00B\00\00\00\00\00\00\00"
   void *foo = L"AB";
 
-  // CHECK: private constant [12 x i8] c"4\12\00\00\0B\F0\10\00\00\00\00\00"
+  // CHECK: private unnamed_addr constant [12 x i8] c"4\12\00\00\0B\F0\10\00\00\00\00\00"
   void *bar = L"\u1234\U0010F00B";
 }
diff --git a/test/CodeGenCXX/predefined-expr.cpp b/test/CodeGenCXX/predefined-expr.cpp
index f5e5ca9..56270b5 100644
--- a/test/CodeGenCXX/predefined-expr.cpp
+++ b/test/CodeGenCXX/predefined-expr.cpp
@@ -1,82 +1,82 @@
 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
 
-// CHECK: private constant [15 x i8] c"externFunction\00"
-// CHECK: private constant [26 x i8] c"void NS::externFunction()\00"
+// CHECK: private unnamed_addr constant [15 x i8] c"externFunction\00"
+// CHECK: private unnamed_addr constant [26 x i8] c"void NS::externFunction()\00"
 
-// CHECK: private constant [22 x i8] c"classTemplateFunction\00"
-// CHECK: private constant [60 x i8] c"void NS::ClassTemplate<NS::Base *>::classTemplateFunction()\00"
-// CHECK: private constant [53 x i8] c"void NS::ClassTemplate<int>::classTemplateFunction()\00"
+// CHECK: private unnamed_addr constant [22 x i8] c"classTemplateFunction\00"
+// CHECK: private unnamed_addr constant [60 x i8] c"void NS::ClassTemplate<NS::Base *>::classTemplateFunction()\00"
+// CHECK: private unnamed_addr constant [53 x i8] c"void NS::ClassTemplate<int>::classTemplateFunction()\00"
 
-// CHECK: private constant [18 x i8] c"functionTemplate1\00"
-// CHECK: private constant [45 x i8] c"void NS::Base::functionTemplate1(NS::Base *)\00"
-// CHECK: private constant [38 x i8] c"void NS::Base::functionTemplate1(int)\00"
+// CHECK: private unnamed_addr constant [18 x i8] c"functionTemplate1\00"
+// CHECK: private unnamed_addr constant [45 x i8] c"void NS::Base::functionTemplate1(NS::Base *)\00"
+// CHECK: private unnamed_addr constant [38 x i8] c"void NS::Base::functionTemplate1(int)\00"
 
-// CHECK: private constant [23 x i8] c"anonymousUnionFunction\00"
-// CHECK: private constant [83 x i8] c"void NS::ContainerForAnonymousRecords::<anonymous union>::anonymousUnionFunction()\00"
+// CHECK: private unnamed_addr constant [23 x i8] c"anonymousUnionFunction\00"
+// CHECK: private unnamed_addr constant [83 x i8] c"void NS::ContainerForAnonymousRecords::<anonymous union>::anonymousUnionFunction()\00"
 
-// CHECK: private constant [24 x i8] c"anonymousStructFunction\00"
-// CHECK: private constant [85 x i8] c"void NS::ContainerForAnonymousRecords::<anonymous struct>::anonymousStructFunction()\00"
+// CHECK: private unnamed_addr constant [24 x i8] c"anonymousStructFunction\00"
+// CHECK: private unnamed_addr constant [85 x i8] c"void NS::ContainerForAnonymousRecords::<anonymous struct>::anonymousStructFunction()\00"
 
-// CHECK: private constant [23 x i8] c"anonymousClassFunction\00"
-// CHECK: private constant [83 x i8] c"void NS::ContainerForAnonymousRecords::<anonymous class>::anonymousClassFunction()\00"
+// CHECK: private unnamed_addr constant [23 x i8] c"anonymousClassFunction\00"
+// CHECK: private unnamed_addr constant [83 x i8] c"void NS::ContainerForAnonymousRecords::<anonymous class>::anonymousClassFunction()\00"
 
-// CHECK: private constant [12 x i8] c"~Destructor\00"
-// CHECK: private constant [30 x i8] c"NS::Destructor::~Destructor()\00"
+// CHECK: private unnamed_addr constant [12 x i8] c"~Destructor\00"
+// CHECK: private unnamed_addr constant [30 x i8] c"NS::Destructor::~Destructor()\00"
 
-// CHECK: private constant [12 x i8] c"Constructor\00"
-// CHECK: private constant [41 x i8] c"NS::Constructor::Constructor(NS::Base *)\00"
-// CHECK: private constant [34 x i8] c"NS::Constructor::Constructor(int)\00"
-// CHECK: private constant [31 x i8] c"NS::Constructor::Constructor()\00"
+// CHECK: private unnamed_addr constant [12 x i8] c"Constructor\00"
+// CHECK: private unnamed_addr constant [41 x i8] c"NS::Constructor::Constructor(NS::Base *)\00"
+// CHECK: private unnamed_addr constant [34 x i8] c"NS::Constructor::Constructor(int)\00"
+// CHECK: private unnamed_addr constant [31 x i8] c"NS::Constructor::Constructor()\00"
 
-// CHECK: private constant [16 x i8] c"virtualFunction\00"
-// CHECK: private constant [44 x i8] c"virtual void NS::Derived::virtualFunction()\00"
+// CHECK: private unnamed_addr constant [16 x i8] c"virtualFunction\00"
+// CHECK: private unnamed_addr constant [44 x i8] c"virtual void NS::Derived::virtualFunction()\00"
 
-// CHECK: private constant [22 x i8] c"constVolatileFunction\00"
-// CHECK: private constant [54 x i8] c"void NS::Base::constVolatileFunction() const volatile\00"
+// CHECK: private unnamed_addr constant [22 x i8] c"constVolatileFunction\00"
+// CHECK: private unnamed_addr constant [54 x i8] c"void NS::Base::constVolatileFunction() const volatile\00"
 
-// CHECK: private constant [17 x i8] c"volatileFunction\00"
-// CHECK: private constant [43 x i8] c"void NS::Base::volatileFunction() volatile\00"
+// CHECK: private unnamed_addr constant [17 x i8] c"volatileFunction\00"
+// CHECK: private unnamed_addr constant [43 x i8] c"void NS::Base::volatileFunction() volatile\00"
 
-// CHECK: private constant [14 x i8] c"constFunction\00"
-// CHECK: private constant [37 x i8] c"void NS::Base::constFunction() const\00"
+// CHECK: private unnamed_addr constant [14 x i8] c"constFunction\00"
+// CHECK: private unnamed_addr constant [37 x i8] c"void NS::Base::constFunction() const\00"
 
-// CHECK: private constant [26 x i8] c"functionReturingTemplate2\00"
-// CHECK: private constant [64 x i8] c"ClassTemplate<NS::Base *> NS::Base::functionReturingTemplate2()\00"
+// CHECK: private unnamed_addr constant [26 x i8] c"functionReturingTemplate2\00"
+// CHECK: private unnamed_addr constant [64 x i8] c"ClassTemplate<NS::Base *> NS::Base::functionReturingTemplate2()\00"
 
-// CHECK: private constant [26 x i8] c"functionReturingTemplate1\00"
-// CHECK: private constant [57 x i8] c"ClassTemplate<int> NS::Base::functionReturingTemplate1()\00"
+// CHECK: private unnamed_addr constant [26 x i8] c"functionReturingTemplate1\00"
+// CHECK: private unnamed_addr constant [57 x i8] c"ClassTemplate<int> NS::Base::functionReturingTemplate1()\00"
 
-// CHECK: private constant [23 x i8] c"withTemplateParameter2\00"
-// CHECK: private constant [65 x i8] c"void NS::Base::withTemplateParameter2(ClassTemplate<NS::Base *>)\00"
+// CHECK: private unnamed_addr constant [23 x i8] c"withTemplateParameter2\00"
+// CHECK: private unnamed_addr constant [65 x i8] c"void NS::Base::withTemplateParameter2(ClassTemplate<NS::Base *>)\00"
 
-// CHECK: private constant [23 x i8] c"withTemplateParameter1\00"
-// CHECK: private constant [58 x i8] c"void NS::Base::withTemplateParameter1(ClassTemplate<int>)\00"
+// CHECK: private unnamed_addr constant [23 x i8] c"withTemplateParameter1\00"
+// CHECK: private unnamed_addr constant [58 x i8] c"void NS::Base::withTemplateParameter1(ClassTemplate<int>)\00"
 
-// CHECK: private constant [23 x i8] c"functionReturningClass\00"
-// CHECK: private constant [45 x i8] c"NS::Base *NS::Base::functionReturningClass()\00"
+// CHECK: private unnamed_addr constant [23 x i8] c"functionReturningClass\00"
+// CHECK: private unnamed_addr constant [45 x i8] c"NS::Base *NS::Base::functionReturningClass()\00"
 
-// CHECK: private constant [23 x i8] c"functionWithParameters\00"
-// CHECK: private constant [64 x i8] c"void NS::Base::functionWithParameters(int, float *, NS::Base *)\00"
+// CHECK: private unnamed_addr constant [23 x i8] c"functionWithParameters\00"
+// CHECK: private unnamed_addr constant [64 x i8] c"void NS::Base::functionWithParameters(int, float *, NS::Base *)\00"
 
-// CHECK: private constant [17 x i8] c"variadicFunction\00"
-// CHECK: private constant [42 x i8] c"void NS::Base::variadicFunction(int, ...)\00"
+// CHECK: private unnamed_addr constant [17 x i8] c"variadicFunction\00"
+// CHECK: private unnamed_addr constant [42 x i8] c"void NS::Base::variadicFunction(int, ...)\00"
 
-// CHECK: private constant [41 x i8] c"virtual void NS::Base::virtualFunction()\00"
+// CHECK: private unnamed_addr constant [41 x i8] c"virtual void NS::Base::virtualFunction()\00"
 
-// CHECK: private constant [15 x i8] c"inlineFunction\00"
-// CHECK: private constant [32 x i8] c"void NS::Base::inlineFunction()\00"
+// CHECK: private unnamed_addr constant [15 x i8] c"inlineFunction\00"
+// CHECK: private unnamed_addr constant [32 x i8] c"void NS::Base::inlineFunction()\00"
 
-// CHECK: private constant [15 x i8] c"staticFunction\00"
-// CHECK: private constant [39 x i8] c"static void NS::Base::staticFunction()\00"
+// CHECK: private unnamed_addr constant [15 x i8] c"staticFunction\00"
+// CHECK: private unnamed_addr constant [39 x i8] c"static void NS::Base::staticFunction()\00"
 
-// CHECK: private constant [26 x i8] c"topLevelNamespaceFunction\00"
-// CHECK: private constant [59 x i8] c"void ClassInTopLevelNamespace::topLevelNamespaceFunction()\00"
+// CHECK: private unnamed_addr constant [26 x i8] c"topLevelNamespaceFunction\00"
+// CHECK: private unnamed_addr constant [59 x i8] c"void ClassInTopLevelNamespace::topLevelNamespaceFunction()\00"
 
-// CHECK: private constant [27 x i8] c"anonymousNamespaceFunction\00"
-// CHECK: private constant [84 x i8] c"void <anonymous namespace>::ClassInAnonymousNamespace::anonymousNamespaceFunction()\00"
+// CHECK: private unnamed_addr constant [27 x i8] c"anonymousNamespaceFunction\00"
+// CHECK: private unnamed_addr constant [84 x i8] c"void <anonymous namespace>::ClassInAnonymousNamespace::anonymousNamespaceFunction()\00"
 
-// CHECK: private constant [19 x i8] c"localClassFunction\00"
-// CHECK: private constant [59 x i8] c"void NS::localClass(int)::LocalClass::localClassFunction()\00"
+// CHECK: private unnamed_addr constant [19 x i8] c"localClassFunction\00"
+// CHECK: private unnamed_addr constant [59 x i8] c"void NS::localClass(int)::LocalClass::localClassFunction()\00"
 
 int printf(const char * _Format, ...);
 
diff --git a/test/CodeGenObjC/predefined-expr.m b/test/CodeGenObjC/predefined-expr.m
index 772093b..43d329e 100644
--- a/test/CodeGenObjC/predefined-expr.m
+++ b/test/CodeGenObjC/predefined-expr.m
@@ -1,15 +1,15 @@
 // RUN: %clang_cc1 -triple i386-apple-darwin9 %s -emit-llvm -o - | FileCheck %s
 
-// CHECK: @"__func__.-[Foo instanceTest1]" = private constant [21 x i8] c"-[Foo instanceTest1]\00"
-// CHECK: @"__func__.-[Foo instanceTest2:]" = private constant [22 x i8] c"-[Foo instanceTest2:]\00"
-// CHECK: @"__func__.-[Foo instanceTest3:withB:]" = private constant [28 x i8] c"-[Foo instanceTest3:withB:]\00"
-// CHECK: @"__func__.-[Foo instanceTest4]" = private constant [21 x i8] c"-[Foo instanceTest4]\00"
-// CHECK: @"__func__.+[Foo classTest1]" = private constant [18 x i8] c"+[Foo classTest1]\00"
-// CHECK: @"__func__.+[Foo classTest2:]" = private constant [19 x i8] c"+[Foo classTest2:]\00"
-// CHECK: @"__func__.+[Foo classTest3:withB:]" = private constant [25 x i8] c"+[Foo classTest3:withB:]\00"
-// CHECK: @"__func__.+[Foo classTest4]" = private constant [18 x i8] c"+[Foo classTest4]\00"
-// CHECK: @"__func__.-[Foo(Category) instanceTestWithCategory]" = private constant [42 x i8] c"-[Foo(Category) instanceTestWithCategory]\00"
-// CHECK: @"__func__.+[Foo(Category) classTestWithCategory]" = private constant [39 x i8] c"+[Foo(Category) classTestWithCategory]\00"
+// CHECK: @"__func__.-[Foo instanceTest1]" = private unnamed_addr constant [21 x i8] c"-[Foo instanceTest1]\00"
+// CHECK: @"__func__.-[Foo instanceTest2:]" = private unnamed_addr constant [22 x i8] c"-[Foo instanceTest2:]\00"
+// CHECK: @"__func__.-[Foo instanceTest3:withB:]" = private unnamed_addr constant [28 x i8] c"-[Foo instanceTest3:withB:]\00"
+// CHECK: @"__func__.-[Foo instanceTest4]" = private unnamed_addr constant [21 x i8] c"-[Foo instanceTest4]\00"
+// CHECK: @"__func__.+[Foo classTest1]" = private unnamed_addr constant [18 x i8] c"+[Foo classTest1]\00"
+// CHECK: @"__func__.+[Foo classTest2:]" = private unnamed_addr constant [19 x i8] c"+[Foo classTest2:]\00"
+// CHECK: @"__func__.+[Foo classTest3:withB:]" = private unnamed_addr constant [25 x i8] c"+[Foo classTest3:withB:]\00"
+// CHECK: @"__func__.+[Foo classTest4]" = private unnamed_addr constant [18 x i8] c"+[Foo classTest4]\00"
+// CHECK: @"__func__.-[Foo(Category) instanceTestWithCategory]" = private unnamed_addr constant [42 x i8] c"-[Foo(Category) instanceTestWithCategory]\00"
+// CHECK: @"__func__.+[Foo(Category) classTestWithCategory]" = private unnamed_addr constant [39 x i8] c"+[Foo(Category) classTestWithCategory]\00"
 
 int printf(const char * _Format, ...);