Fix a bug in the ComputeMaskedBits logic for multiply.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50793 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 3e75f7b305..3d5a126df1 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1244,8 +1244,8 @@ void SelectionDAG::ComputeMaskedBits(SDOperand Op, const APInt &Mask,
     unsigned TrailZ = KnownZero.countTrailingOnes() +
                       KnownZero2.countTrailingOnes();
     unsigned LeadZ =  std::max(KnownZero.countLeadingOnes() +
-                               KnownZero2.countLeadingOnes() +
-                               1, BitWidth) - BitWidth;
+                               KnownZero2.countLeadingOnes(),
+                               BitWidth) - BitWidth;
 
     TrailZ = std::min(TrailZ, BitWidth);
     LeadZ = std::min(LeadZ, BitWidth);