Add convenient helper for checking whether global is weak in linker sense

having weak or linkonce or common or extweak LLVM linkage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53158 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/include/llvm/GlobalValue.h b/include/llvm/GlobalValue.h
index bc0c0a7937..6b6610b724 100644
--- a/include/llvm/GlobalValue.h
+++ b/include/llvm/GlobalValue.h
@@ -110,6 +110,15 @@ public:
   void setLinkage(LinkageTypes LT) { Linkage = LT; }
   LinkageTypes getLinkage() const { return Linkage; }
 
+  /// isWeakForLinker - Determines if symbol is weak for linker having weak or
+  /// linkonce or common or extweak LLVM linkage.
+  bool isWeakForLinker() const {
+    return (Linkage == WeakLinkage ||
+            Linkage == LinkOnceLinkage ||
+            Linkage == CommonLinkage ||
+            Linkage == ExternalWeakLinkage);
+  }
+
   /// copyAttributesFrom - copy all additional attributes (those not needed to
   /// create a GlobalValue) from the GlobalValue Src to this one.
   virtual void copyAttributesFrom(const GlobalValue *Src);