Add comment explaning the use of c99 inline in c++.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101787 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 9cb27cc..486c694 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -315,6 +315,10 @@
== TSK_ExplicitInstantiationDeclaration)
return CodeGenModule::GVA_C99Inline;
+ // If this is a virtual method and its class has a key method in another
+ // translation unit, we know that this method will be present in that
+ // translation unit. In this translation unit we will use this method
+ // only for inlining and analysis. This is the semantics of c99 inline.
if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
const CXXRecordDecl *RD = MD->getParent();
if (MD->isVirtual() &&