[ThinLTO] Add code comment. NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375500 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/FunctionImport.cpp b/lib/Transforms/IPO/FunctionImport.cpp
index 2ce8c92..3f5cc07 100644
--- a/lib/Transforms/IPO/FunctionImport.cpp
+++ b/lib/Transforms/IPO/FunctionImport.cpp
@@ -952,6 +952,9 @@
if (NewLinkage == GV.getLinkage())
return;
if (GlobalValue::isLocalLinkage(GV.getLinkage()) ||
+ // Don't internalize anything here, because the code below
+ // lacks necessary correctness checks. Leave this job to
+ // LLVM 'internalize' pass.
GlobalValue::isLocalLinkage(NewLinkage) ||
// In case it was dead and already converted to declaration.
GV.isDeclaration())
