From 47cf5b581a3924803ec6ac431f44c650b1266a65 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 19 Apr 2010 16:58:20 +0000
Subject: [PATCH] Add comment explaning the use of c99 inline in c++.

llvm-svn: 101787
---
 clang/lib/CodeGen/CodeGenModule.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 9cb27cc1010b..486c6948d174 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -315,6 +315,10 @@ GetLinkageForFunction(ASTContext &Context, const FunctionDecl *FD,
                                        == 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() &&