From: Chris Lattner <sabre@nondot.org>
Date: Sun, 29 Mar 2009 06:32:46 +0000 (+0000)
Subject: add helper method.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ba315c1ee7bef78c6824441fe6c1761596ec9880;p=oota-llvm.git

add helper method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67989 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/PointerUnion.h b/include/llvm/ADT/PointerUnion.h
index 8ea1315a736..7a4de656566 100644
--- a/include/llvm/ADT/PointerUnion.h
+++ b/include/llvm/ADT/PointerUnion.h
@@ -78,6 +78,8 @@ namespace llvm {
       Val.setInt(1);
     }
     
+    bool isNull() const { return Val.getPointer() == 0; }
+    
     template<typename T>
     int is() const {
       return Val.getInt() == ::llvm::getPointerUnionTypeNum<PT1, PT2>((T*)0);