From: Owen Anderson <resistor@mac.com>
Date: Mon, 9 Jul 2007 23:39:39 +0000 (+0000)
Subject: When resizing a BitVector with size 0, be sure to clear the low word before using it.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0c81450a0c1f859738a2f209a89de10f889fcd84;p=oota-llvm.git

When resizing a BitVector with size 0, be sure to clear the low word before using it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38476 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/ADT/BitVector.h b/include/llvm/ADT/BitVector.h
index 6418f7f66b4..5247756618e 100644
--- a/include/llvm/ADT/BitVector.h
+++ b/include/llvm/ADT/BitVector.h
@@ -185,6 +185,11 @@ public:
       grow(N);
       init_words(&Bits[OldCapacity], (Capacity-OldCapacity), t);
     }
+    
+    // If we previously had no size, initialize the low word
+    if (Size == 0)
+      Bits[0] = t;
+    
     Size = N;
     clear_unused_bits();
   }