[llvm-commits] [llvm] r42605 - /llvm/trunk/include/llvm/ADT/SparseBitVector.h

[Daniel Berlin]

Author: dannyb
Date: Thu Oct  4 00:29:36 2007
New Revision: 42605

URL: http://llvm.org/viewvc/llvm-project?rev=42605&view=rev
Log:
It helps a lot when you check for the end of your list before randomly
dereferencing things.

Modified:
    llvm/trunk/include/llvm/ADT/SparseBitVector.h

Modified: llvm/trunk/include/llvm/ADT/SparseBitVector.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/SparseBitVector.h?rev=42605&r1=42604&r2=42605&view=diff

==============================================================================
--- llvm/trunk/include/llvm/ADT/SparseBitVector.h (original)
+++ llvm/trunk/include/llvm/ADT/SparseBitVector.h Thu Oct  4 00:29:36 2007
@@ -538,7 +538,8 @@
         // 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);