[llvm-commits] CVS: llvm/include/llvm/ADT/BitVector.h

[Reid Spencer]

Changes in directory llvm/include/llvm/ADT:

BitVector.h updated: 1.14 -> 1.15
---
Log message:

Fix an off-by-one bug in computing the index of the word to clear.


---
Diffs of the changes:  (+4 -1)

 BitVector.h |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletion(-)


Index: llvm/include/llvm/ADT/BitVector.h
diff -u llvm/include/llvm/ADT/BitVector.h:1.14 llvm/include/llvm/ADT/BitVector.h:1.15
--- llvm/include/llvm/ADT/BitVector.h:1.14	Thu Feb 15 14:14:06 2007
+++ llvm/include/llvm/ADT/BitVector.h	Thu Feb 15 14:49:10 2007
@@ -292,7 +292,10 @@
   void clear_unused_bits() {
     if (Size) {
       unsigned ExtraBits = Size % BITS_PER_WORD;
-      Bits[Size / BITS_PER_WORD] &= ~(~0 << ExtraBits);
+      unsigned index = Size / BITS_PER_WORD;
+      if (Size % BITS_PER_WORD == 0)
+        index--;
+      Bits[index] &= ~(~0 << ExtraBits);
     }
   }