[llvm] r247044 - Fix isDiscardableIfUnused to include available_externally linkage.

[Evgeniy Stepanov via llvm-commits]

Author: eugenis
Date: Tue Sep  8 13:25:20 2015
New Revision: 247044

URL: http://llvm.org/viewvc/llvm-project?rev=247044&view=rev
Log:
Fix isDiscardableIfUnused to include available_externally linkage.

AvailableExternally functions are discardable.

Modified:
    llvm/trunk/include/llvm/IR/GlobalValue.h

Modified: llvm/trunk/include/llvm/IR/GlobalValue.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/GlobalValue.h?rev=247044&r1=247043&r2=247044&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/GlobalValue.h (original)
+++ llvm/trunk/include/llvm/IR/GlobalValue.h Tue Sep  8 13:25:20 2015
@@ -236,7 +236,8 @@ public:
   /// Whether the definition of this global may be discarded if it is not used
   /// in its compilation unit.
   static bool isDiscardableIfUnused(LinkageTypes Linkage) {
-    return isLinkOnceLinkage(Linkage) || isLocalLinkage(Linkage);
+    return isLinkOnceLinkage(Linkage) || isLocalLinkage(Linkage) ||
+           isAvailableExternallyLinkage(Linkage);
   }
 
   /// Whether the definition of this global may be replaced by something