Add some documentation.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@79373 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 8cee4a6..7042573 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -361,6 +361,7 @@
   /// legal to call this function even if there is no current insertion point.
   void FinishFunction(SourceLocation EndLoc=SourceLocation());
 
+  /// GenerateVtable - Generate the vtable for the given type.
   llvm::Value *GenerateVtable(const CXXRecordDecl *RD);
 
   void EmitCtorPrologue(const CXXConstructorDecl *CD);