vendor/llvm/llvm-trunk-r321017

1 files changed, 2 insertions, 2 deletions

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index a1cce6e5fe17..c81363cc16b7 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1724,13 +1724,13 @@ public:
   /// @{
 
   /// \returns the floor log base 2 of this APInt.
-  unsigned logBase2() const { return BitWidth - 1 - countLeadingZeros(); }
+  unsigned logBase2() const { return getActiveBits() -  1; }
 
   /// \returns the ceil log base 2 of this APInt.
   unsigned ceilLogBase2() const {
     APInt temp(*this);
     --temp;
-    return BitWidth - temp.countLeadingZeros();
+    return temp.getActiveBits();
   }
 
   /// \returns the nearest log base 2 of this APInt. Ties round up.