From: Evgeniy Stepanov <eugeni.stepanov@gmail.com>
Date: Tue, 8 Sep 2015 18:25:20 +0000 (+0000)
Subject: Fix isDiscardableIfUnused to include available_externally linkage.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=242f547927bfde1d2709929c733422a6d15a3a10;p=oota-llvm.git

Fix isDiscardableIfUnused to include available_externally linkage.

AvailableExternally functions are discardable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247044 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/IR/GlobalValue.h b/include/llvm/IR/GlobalValue.h
index 2961369a732..eb6af507816 100644
--- a/include/llvm/IR/GlobalValue.h
+++ b/include/llvm/IR/GlobalValue.h
@@ -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