diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 86db853..8baf419 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -26,14 +26,6 @@
   return new (Mem) CXXFieldDecl(RD, L, Id, T, BW);
 }
 
-CXXBaseSpecifier *CXXBaseSpecifier::Create(ASTContext &C, SourceRange R, bool V, 
-                                           bool BC, AccessSpecifier A, QualType T)
-{
-  void *Mem = C.getAllocator().Allocate<CXXBaseSpecifier>();
-  CXXBaseSpecifier* BS = new (Mem) CXXBaseSpecifier(R, V, BC, A, T);
-  return BS;
-}
-
 CXXRecordDecl *CXXRecordDecl::Create(ASTContext &C, TagKind TK, DeclContext *DC,
                                      SourceLocation L, IdentifierInfo *Id,
                                      CXXRecordDecl* PrevDecl) {
@@ -44,11 +36,21 @@
 }
 
 CXXRecordDecl::~CXXRecordDecl() {
-  for (unsigned i = 0; i < NumBases; ++i)
-    delete Bases[i];
   delete [] Bases;
 }
 
+void 
+CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases, 
+                        unsigned NumBases) {
+  if (this->Bases)
+    delete [] this->Bases;
+
+  this->Bases = new CXXBaseSpecifier[NumBases];
+  this->NumBases = NumBases;
+  for (unsigned i = 0; i < NumBases; ++i)
+    this->Bases[i] = *Bases[i];
+}
+
 CXXMethodDecl *
 CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
                       SourceLocation L, IdentifierInfo *Id,
diff --git a/lib/AST/InheritViz.cpp b/lib/AST/InheritViz.cpp
index b817ed6..bfd859f 100644
--- a/lib/AST/InheritViz.cpp
+++ b/lib/AST/InheritViz.cpp
@@ -92,8 +92,8 @@
   // Display the base classes.
   const CXXRecordDecl *Decl 
     = static_cast<const CXXRecordDecl *>(Type->getAsRecordType()->getDecl());
-  for (unsigned idx = 0; idx < Decl->getNumBases(); ++idx) {
-    const CXXBaseSpecifier *Base = Decl->getBase(idx);
+  for (CXXRecordDecl::base_class_const_iterator Base = Decl->bases_begin();
+       Base != Decl->bases_end(); ++Base) {
     QualType CanonBaseType = Context.getCanonicalType(Base->getType());
 
     // If this is not virtual inheritance, bump the direct base
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index f17875b..729bd7c 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -299,11 +299,8 @@
   }
 
   // Create the base specifier.
-  CXXBaseSpecifier *BS = CXXBaseSpecifier::Create(Context, SpecifierRange, 
-                                                  Virtual, 
-                                                  BaseType->isClassType(),
-                                                  Access, BaseType);
-  return BS;
+  return new CXXBaseSpecifier(SpecifierRange, Virtual, 
+                              BaseType->isClassType(), Access, BaseType);
 }
 
 /// ActOnBaseSpecifiers - Attach the given base specifiers to the
@@ -316,34 +313,45 @@
 
   // Used to keep track of which base types we have already seen, so
   // that we can properly diagnose redundant direct base types. Note
-  // that the key is always the canonical type.
+  // that the key is always the unqualified canonical type of the base
+  // class.
   std::map<QualType, CXXBaseSpecifier*, QualTypeOrdering> KnownBaseTypes;
 
   // Copy non-redundant base specifiers into permanent storage.
-  CXXBaseSpecifier **InBaseSpecs = (CXXBaseSpecifier **)Bases;
-  CXXBaseSpecifier **StoredBaseSpecs = new CXXBaseSpecifier* [NumBases];
-  unsigned outIdx = 0;
-  for (unsigned inIdx = 0; inIdx < NumBases; ++inIdx) {
+  CXXBaseSpecifier **BaseSpecs = (CXXBaseSpecifier **)Bases;
+  unsigned NumGoodBases = 0;
+  for (unsigned idx = 0; idx < NumBases; ++idx) {
     QualType NewBaseType 
-      = Context.getCanonicalType(InBaseSpecs[inIdx]->getType());
+      = Context.getCanonicalType(BaseSpecs[idx]->getType());
+    NewBaseType = NewBaseType.getUnqualifiedType();
+
     if (KnownBaseTypes[NewBaseType]) {
       // C++ [class.mi]p3:
       //   A class shall not be specified as a direct base class of a
       //   derived class more than once.
-      Diag(InBaseSpecs[inIdx]->getSourceRange().getBegin(),
+      Diag(BaseSpecs[idx]->getSourceRange().getBegin(),
            diag::err_duplicate_base_class, 
            KnownBaseTypes[NewBaseType]->getType().getAsString(),
-           InBaseSpecs[inIdx]->getSourceRange());
+           BaseSpecs[idx]->getSourceRange());
+
+      // Delete the duplicate base class specifier; we're going to
+      // overwrite its pointer later.
+      delete BaseSpecs[idx];
     } else {
       // Okay, add this new base class.
-      KnownBaseTypes[NewBaseType] = InBaseSpecs[inIdx];
-      StoredBaseSpecs[outIdx++] = InBaseSpecs[inIdx];
+      KnownBaseTypes[NewBaseType] = BaseSpecs[idx];
+      BaseSpecs[NumGoodBases++] = BaseSpecs[idx];
     }
   }
 
   // Attach the remaining base class specifiers to the derived class.
   CXXRecordDecl *Decl = (CXXRecordDecl*)ClassDecl;
-  Decl->setBases(StoredBaseSpecs, outIdx);
+  Decl->setBases(BaseSpecs, NumGoodBases);
+
+  // Delete the remaining (good) base class specifiers, since their
+  // data has been copied into the CXXRecordDecl.
+  for (unsigned idx = 0; idx < NumGoodBases; ++idx)
+    delete BaseSpecs[idx];
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Sema/SemaInherit.cpp b/lib/Sema/SemaInherit.cpp
index 022c804..6890dbf 100644
--- a/lib/Sema/SemaInherit.cpp
+++ b/lib/Sema/SemaInherit.cpp
@@ -39,8 +39,8 @@
   if (const RecordType *DerivedType = Derived->getAsRecordType()) {
     const CXXRecordDecl *Decl 
       = static_cast<const CXXRecordDecl *>(DerivedType->getDecl());
-    for (unsigned idx = 0; idx < Decl->getNumBases(); ++idx) {
-      const CXXBaseSpecifier *BaseSpec = Decl->getBase(idx);
+    for (CXXRecordDecl::base_class_const_iterator BaseSpec = Decl->bases_begin();
+         BaseSpec != Decl->bases_end(); ++BaseSpec) {
       if (Context.getCanonicalType(BaseSpec->getType()) == Base
           || IsDerivedFrom(BaseSpec->getType(), Base))
         return true;