[PATCH] D12576: Fix isDiscardableIfUnused to include available_externally linkage.

[Evgeniy Stepanov via llvm-commits]

eugenis created this revision.
eugenis added a reviewer: rsmith.
eugenis added a subscriber: llvm-commits.
eugenis set the repository for this revision to rL LLVM.

AvailableExternally functions are discardable.

Repository:
  rL LLVM

http://reviews.llvm.org/D12576

Files:
  include/llvm/IR/GlobalValue.h

Index: include/llvm/IR/GlobalValue.h
===================================================================
--- include/llvm/IR/GlobalValue.h
+++ include/llvm/IR/GlobalValue.h
@@ -236,7 +236,8 @@
   /// 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


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