[BitVector] Make find_prev member function const.

NFC.

llvm-svn: 302458

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/include/llvm/ADT/BitVector.h b/llvm/include/llvm/ADT/BitVector.h
index e835f151622..4a2af7cd68a 100644
--- a/llvm/include/llvm/ADT/BitVector.h
+++ b/llvm/include/llvm/ADT/BitVector.h
@@ -255,7 +255,7 @@ public:
 
   /// find_prev - Returns the index of the first set bit that precedes the
   /// the bit at \p PriorTo.  Returns -1 if all previous bits are unset.
-  int find_prev(unsigned PriorTo) {
+  int find_prev(unsigned PriorTo) const {
     if (PriorTo == 0)
       return -1;