From: Daniel Berlin <dberlin@dberlin.org>
Date: Thu, 4 Oct 2007 05:29:36 +0000 (+0000)
Subject: It helps a lot when you check for the end of your list before randomly
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8d69b5a1137debfe11e9073c4edb99d477387072;p=oota-llvm.git

It helps a lot when you check for the end of your list before randomly
dereferencing things.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42605 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/SparseBitVector.h b/include/llvm/ADT/SparseBitVector.h
index d1e91250680..b02eb3e4805 100644
--- a/include/llvm/ADT/SparseBitVector.h
+++ b/include/llvm/ADT/SparseBitVector.h
@@ -538,7 +538,8 @@ public:
         // We may have hit the beginning of our SparseBitVector, in which case,
         // we may need to insert right after this element, which requires moving
         // the current iterator forward one, because insert does insert before.
-        if (ElementIter->index() < ElementIndex)
+        if (ElementIter != Elements.end() &&
+            ElementIter->index() < ElementIndex)
           ElementIter = Elements.insert(++ElementIter, Element);
         else
           ElementIter = Elements.insert(ElementIter, Element);