Make a bunch of CompileUnit member functions private.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192009 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 0668646..5e31cba 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -880,7 +880,7 @@
       GlobalTypes[Ty.getName()] = Entry->getEntry();
 }
 
-/// addPubTypes - Add type for pubtypes section.
+/// addPubTypes - Add subprogram argument types for pubtypes section.
 void CompileUnit::addPubTypes(DISubprogram SP) {
   DICompositeType SPTy = SP.getType();
   uint16_t SPTag = SPTy.getTag();