Add CommonLinkage; currently tentative definitions

are represented as "weak", but there are subtle differences
in some cases on Darwin, so we need both.  The intent
is that "common" will behave identically to "weak" unless
somebody changes their target to do something else.
No functional change as yet.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51118 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 1 deletions

diff --git a/include/llvm/GlobalValue.h b/include/llvm/GlobalValue.h
index 808471d0a4..60b2d1c534 100644
--- a/include/llvm/GlobalValue.h
+++ b/include/llvm/GlobalValue.h
@@ -38,7 +38,8 @@ public:
     DLLImportLinkage,   ///< Function to be imported from DLL
     DLLExportLinkage,   ///< Function to be accessible from DLL
     ExternalWeakLinkage,///< ExternalWeak linkage description
-    GhostLinkage        ///< Stand-in functions for streaming fns from BC files    
+    GhostLinkage,       ///< Stand-in functions for streaming fns from BC files
+    CommonLinkage       ///< Tentative definitions
   };
 
   /// @brief An enumeration for the kinds of visibility of global values.
@@ -100,6 +101,7 @@ public:
   bool hasExternalLinkage()   const { return Linkage == ExternalLinkage; }
   bool hasLinkOnceLinkage()   const { return Linkage == LinkOnceLinkage; }
   bool hasWeakLinkage()       const { return Linkage == WeakLinkage; }
+  bool hasCommonLinkage()     const { return Linkage == CommonLinkage; }
   bool hasAppendingLinkage()  const { return Linkage == AppendingLinkage; }
   bool hasInternalLinkage()   const { return Linkage == InternalLinkage; }
   bool hasDLLImportLinkage()  const { return Linkage == DLLImportLinkage; }