Move 3 helper function to Linkage.h

This removes a duplicate from Decl.cpp and a followup patch will use
isExternallyVisible.

llvm-svn: 182735

1 files changed, 2 insertions, 6 deletions

diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index fd0f7251376..5e0ffdacf09 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -495,10 +495,6 @@ static bool isSingleLineExternC(const Decl &D) {
   return false;
 }
 
-static bool isExternalLinkage(Linkage L) {
-  return L == UniqueExternalLinkage || L == ExternalLinkage;
-}
-
 static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D,
                                               LVComputationKind computation) {
   assert(D->getDeclContext()->getRedeclContext()->isFileContext() &&
@@ -722,7 +718,7 @@ static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D,
   } else if (isa<EnumConstantDecl>(D)) {
     LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()),
                                       computation);
-    if (!isExternalLinkage(EnumLV.getLinkage()))
+    if (!isExternalFormalLinkage(EnumLV.getLinkage()))
       return LinkageInfo::none();
     LV.merge(EnumLV);
 
@@ -793,7 +789,7 @@ static LinkageInfo getLVForClassMember(const NamedDecl *D,
 
   LinkageInfo classLV =
     getLVForDecl(cast<RecordDecl>(D->getDeclContext()), classComputation);
-  if (!isExternalLinkage(classLV.getLinkage()))
+  if (!isExternalFormalLinkage(classLV.getLinkage()))
     return LinkageInfo::none();
 
   // If the class already has unique-external linkage, we can't improve.