Preliminary support for function overloading

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57909 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index f4266fb..cbbfe31 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -182,11 +182,14 @@
   // C++ 3.9.1p5
   InitBuiltinType(WCharTy,             BuiltinType::WChar);
 
+  // Placeholder type for functions.
+  InitBuiltinType(OverloadTy,         BuiltinType::Overload);
+
   // C99 6.2.5p11.
   FloatComplexTy      = getComplexType(FloatTy);
   DoubleComplexTy     = getComplexType(DoubleTy);
   LongDoubleComplexTy = getComplexType(LongDoubleTy);
-  
+
   BuiltinVaListType = QualType();
   ObjCIdType = QualType();
   IdStructType = 0;