Add an explicit UsuallyTinyPtrVector that takes a single element.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102283 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/AST/UsuallyTinyPtrVector.h

@@ -33,6 +33,8 @@ class UsuallyTinyPtrVector {
 
 public:
   UsuallyTinyPtrVector() : Storage(0) { }
+  explicit UsuallyTinyPtrVector(T *Element) 
+    : Storage(reinterpret_cast<uintptr_t>(Element)) { }
   
   bool empty() const { return !Storage; }
 

lib/Sema/SemaDeclCXX.cpp

@@ -1503,11 +1503,10 @@ BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor,
                           SourceLocation(), ParamType, 0);
     
     // Cast to the base class to avoid ambiguities.
-    CXXBaseSpecifierArray BasePath;
-    BasePath.push_back(BaseSpec);
     SemaRef.ImpCastExprToType(CopyCtorArg, BaseSpec->getType(), 
                               CastExpr::CK_UncheckedDerivedToBase,
-                              /*isLvalue=*/true, BasePath);
+                              /*isLvalue=*/true, 
+                              CXXBaseSpecifierArray(BaseSpec));
 
     InitializationKind InitKind
       = InitializationKind::CreateDirect(Constructor->getLocation(),