r279490 - Add comments. NFC

[Adrian Prantl via cfe-commits]

Author: adrian
Date: Mon Aug 22 17:38:16 2016
New Revision: 279490

URL: http://llvm.org/viewvc/llvm-project?rev=279490&view=rev
Log:
Add comments. NFC

Modified:
    cfe/trunk/lib/CodeGen/CGDebugInfo.cpp

Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=279490&r1=279489&r2=279490&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Mon Aug 22 17:38:16 2016
@@ -1650,8 +1650,10 @@ static bool hasExplicitMemberDefinition(
 
 /// Does a type definition exist in an imported clang module?
 static bool isDefinedInClangModule(const RecordDecl *RD) {
+  // Only definitions that where imported from an AST file come from a module.
   if (!RD || !RD->isFromASTFile())
     return false;
+  // Anonymous entities cannot be addressed. Treat them as not from module.
   if (!RD->isExternallyVisible() && RD->getName().empty())
     return false;
   if (auto *CXXDecl = dyn_cast<CXXRecordDecl>(RD)) {