comment

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172317 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index 2987e7c276aa66e9a3490bee88c515577cbac14e..aeffd0a240fdea18796bd4f526ef4179e7309140 100644 (file)
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -1761,6 +1761,9 @@ bool FunctionDecl::isReservedGlobalPlacementOperator() const {
 }
 
 bool FunctionDecl::hasCLanguageLinkage() const {
+  // Users expect to be able to write
+  // extern "C" void *__builtin_alloca (size_t);
+  // so consider builtins as having C language linkage.
   if (getBuiltinID())
     return true;