diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index 70eeb94..d55d0f8 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -19,12 +19,9 @@
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclObjC.h"
 #include "llvm/ADT/StringExtras.h"
-
 using namespace clang;
 using namespace CodeGen;
 
-using llvm::utostr;
-
 
 // FIXME: Name mangling should be moved to a separate class.
 
@@ -35,7 +32,7 @@
          "Only one level of decl context mangling is currently supported!");
   
   if (const FunctionDecl* FD = dyn_cast<FunctionDecl>(D)) {
-    S += utostr(FD->getIdentifier()->getLength());
+    S += llvm::utostr(FD->getIdentifier()->getLength());
     S += FD->getIdentifier()->getName();
     
     if (FD->param_size() == 0)
@@ -48,11 +45,11 @@
     std::string Name;
     Name += MD->isInstance() ? '-' : '+';
     Name += '[';
-    Name += MD->getClassInterface()->getName();
+    Name += MD->getClassInterface()->getNameAsString();
     Name += ' ';
-    Name += MD->getSelector().getName();
+    Name += MD->getSelector().getAsString();
     Name += ']';
-    S += utostr(Name.length());
+    S += llvm::utostr(Name.length());
     S += Name;
   } else 
     assert(0 && "Unsupported decl type!");
@@ -64,7 +61,7 @@
   mangleDeclContextInternal(D.getDeclContext(), S);
   S += 'E';
   
-  S += utostr(D.getIdentifier()->getLength());
+  S += llvm::utostr(D.getIdentifier()->getLength());
   S += D.getIdentifier()->getName();
 }
 
diff --git a/lib/CodeGen/CGObjCGNU.cpp b/lib/CodeGen/CGObjCGNU.cpp
index 25e3915..9bcd816 100644
--- a/lib/CodeGen/CGObjCGNU.cpp
+++ b/lib/CodeGen/CGObjCGNU.cpp
@@ -205,7 +205,7 @@
 /// GetSelector - Return the pointer to the unique'd string for this selector.
 llvm::Value *CGObjCGNU::GetSelector(CGBuilderTy &Builder, Selector Sel) {
   // FIXME: uniquing on the string is wasteful, unique on Sel instead!
-  llvm::GlobalAlias *&US = UntypedSelectors[Sel.getName()];
+  llvm::GlobalAlias *&US = UntypedSelectors[Sel.getAsString()];
   if (US == 0)
     US = new llvm::GlobalAlias(llvm::PointerType::getUnqual(SelectorTy),
                                llvm::GlobalValue::InternalLinkage,
@@ -370,13 +370,14 @@
   std::vector<llvm::Constant*> Elements;
   for (unsigned int i = 0, e = MethodTypes.size(); i < e; ++i) {
     Elements.clear();
-    llvm::Constant *C = CGM.GetAddrOfConstantCString(MethodSels[i].getName());
+    llvm::Constant *C = 
+      CGM.GetAddrOfConstantCString(MethodSels[i].getAsString());
     Elements.push_back(llvm::ConstantExpr::getGetElementPtr(C, Zeros, 2));
     Elements.push_back(
           llvm::ConstantExpr::getGetElementPtr(MethodTypes[i], Zeros, 2));
     llvm::Constant *Method =
       TheModule.getFunction(SymbolNameForMethod(ClassName, CategoryName,
-                                                MethodSels[i].getName(),
+                                                MethodSels[i].getAsString(),
                                                 isClassMethodList));
     Method = llvm::ConstantExpr::getBitCast(Method,
         llvm::PointerType::getUnqual(IMPTy));
@@ -581,7 +582,7 @@
     std::string TypeStr;
     Context.getObjCEncodingForMethodDecl(*iter, TypeStr);
     InstanceMethodNames.push_back(
-        CGM.GetAddrOfConstantCString((*iter)->getSelector().getName()));
+        CGM.GetAddrOfConstantCString((*iter)->getSelector().getAsString()));
     InstanceMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr));
   }
   // Collect information about class methods:
@@ -592,7 +593,7 @@
     std::string TypeStr;
     Context.getObjCEncodingForMethodDecl((*iter),TypeStr);
     ClassMethodNames.push_back(
-        CGM.GetAddrOfConstantCString((*iter)->getSelector().getName()));
+        CGM.GetAddrOfConstantCString((*iter)->getSelector().getAsString()));
     ClassMethodTypes.push_back(CGM.GetAddrOfConstantCString(TypeStr));
   }
 
@@ -932,9 +933,9 @@
 llvm::Function *CGObjCGNU::GenerateMethod(const ObjCMethodDecl *OMD) {  
   const ObjCCategoryImplDecl *OCD = 
     dyn_cast<ObjCCategoryImplDecl>(OMD->getMethodContext());
-  const std::string &CategoryName = OCD ? OCD->getName() : "";
-  const std::string &ClassName = OMD->getClassInterface()->getName();
-  const std::string &MethodName = OMD->getSelector().getName();
+  std::string CategoryName = OCD ? OCD->getNameAsString() : "";
+  std::string ClassName = OMD->getClassInterface()->getNameAsString();
+  std::string MethodName = OMD->getSelector().getAsString();
   bool isClassMethod = !OMD->isInstance();
 
   const llvm::FunctionType *MethodTy = 
diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 8eb81a4..f9a4d77 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -2065,7 +2065,8 @@
   llvm::GlobalVariable *&Entry = MethodVarNames[Sel];
 
   if (!Entry) {
-    llvm::Constant *C = llvm::ConstantArray::get(Sel.getName());
+    // FIXME: Avoid std::string copying.
+    llvm::Constant *C = llvm::ConstantArray::get(Sel.getAsString());
     Entry = 
       new llvm::GlobalVariable(C->getType(), false, 
                                llvm::GlobalValue::InternalLinkage,
@@ -2143,14 +2144,12 @@
 void CGObjCMac::GetNameForMethod(const ObjCMethodDecl *D, 
                                  std::string &NameOut) {
   // FIXME: Find the mangling GCC uses.
-  std::stringstream s;
-  s << (D->isInstance() ? "-" : "+");
-  s << "[";
-  s << D->getClassInterface()->getName();
-  s << " ";
-  s << D->getSelector().getName();
-  s << "]";
-  NameOut = s.str();
+  NameOut = (D->isInstance() ? "-" : "+");
+  NameOut += '[';
+  NameOut += D->getClassInterface()->getName();
+  NameOut += ' ';
+  NameOut += D->getSelector().getAsString();
+  NameOut += ']';
 }
 
 void CGObjCMac::FinishModule() {