diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 0344f56..7855b91 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -19,6 +19,7 @@
 #include "clang/AST/RecordLayout.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/FileManager.h"
+#include "clang/Basic/TargetInfo.h"
 #include "clang/Frontend/CompileOptions.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
@@ -33,12 +34,22 @@
 using namespace clang;
 using namespace clang::CodeGen;
 
-CGDebugInfo::CGDebugInfo(CodeGenModule *m)
+CGDebugInfo::CGDebugInfo(CodeGenModule *m, TargetInfo *t)
   : M(m), isMainCompileUnitCreated(false), DebugFactory(M->getModule()),
     BlockLiteralGenericSet(false) {
+  LLVMMangler = new llvm::Mangler(m->getModule(), t->getUserLabelPrefix(), ".");
+  // add chars used in ObjC method names so method names aren't mangled
+  LLVMMangler->markCharAcceptable('[');
+  LLVMMangler->markCharAcceptable(']');
+  LLVMMangler->markCharAcceptable('(');
+  LLVMMangler->markCharAcceptable(')');
+  LLVMMangler->markCharAcceptable('-');
+  LLVMMangler->markCharAcceptable('+');
+  LLVMMangler->markCharAcceptable(' ');
 }
 
 CGDebugInfo::~CGDebugInfo() {
+  delete LLVMMangler;
   assert(RegionStack.empty() && "Region stack mismatch, stack not empty!");
 }
 
@@ -820,8 +831,6 @@
 void CGDebugInfo::EmitFunctionStart(const char *Name, QualType ReturnType,
                                     llvm::Function *Fn,
                                     CGBuilderTy &Builder) {
-  const char *LinkageName = Name;
-  
   // Skip the asm prefix if it exists.
   //
   // FIXME: This should probably be the unmangled name?
@@ -834,7 +843,8 @@
   unsigned LineNo = SM.getPresumedLoc(CurLoc).getLine();
   
   llvm::DISubprogram SP =
-    DebugFactory.CreateSubprogram(Unit, Name, Name, LinkageName, Unit, LineNo,
+    DebugFactory.CreateSubprogram(Unit, Name, Name, LLVMMangler->getValueName(Fn), 
+                                  Unit, LineNo,
                                   getOrCreateType(ReturnType, Unit),
                                   Fn->hasInternalLinkage(), true/*definition*/);
   
@@ -969,7 +979,9 @@
                                            ArrayType::Normal, 0);
   }
 
-  DebugFactory.CreateGlobalVariable(Unit, Name, Name, "", Unit, LineNo,
+  DebugFactory.CreateGlobalVariable(Unit, Name, Name, 
+                                    LLVMMangler->getValueName(Var),
+                                    Unit, LineNo,
                                     getOrCreateType(T, Unit),
                                     Var->hasInternalLinkage(),
                                     true/*definition*/, Var);
@@ -999,7 +1011,9 @@
                                            ArrayType::Normal, 0);
   }
 
-  DebugFactory.CreateGlobalVariable(Unit, Name, Name, "", Unit, LineNo,
+  DebugFactory.CreateGlobalVariable(Unit, Name, Name, 
+                                    LLVMMangler->getValueName(Var),
+                                    Unit, LineNo,
                                     getOrCreateType(T, Unit),
                                     Var->hasInternalLinkage(),
                                     true/*definition*/, Var);