Mangler: Split isStdNamespace for when the caller already has a NamespaceDecl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89550 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 5 deletions

diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index 377b7f421d..095fb45fd8 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -277,15 +277,16 @@ void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {
   mangleBareFunctionType(FT, MangleReturnType);
 }
 
-static bool isStdNamespace(const DeclContext *DC) {
-  if (!DC->isNamespace() || !DC->getParent()->isTranslationUnit())
-    return false;
-
-  const NamespaceDecl *NS = cast<NamespaceDecl>(DC);
+static bool isStdNamespace(const NamespaceDecl *NS) {
   const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier();
   return II && II->isStr("std");
 }
 
+static bool isStdNamespace(const DeclContext *DC) {
+  return DC->isNamespace() && DC->getParent()->isTranslationUnit() &&
+    isStdNamespace(cast<NamespaceDecl>(DC));
+}
+
 static const TemplateDecl *
 isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
   // Check if we have a function template.