commit 42ac929ed968939d22a715769e583aeed8f6c823
author Dan Gohman <gohman@apple.com> Wed May 07 00:35:55 2008 +0000
committer Dan Gohman <gohman@apple.com> Wed May 07 00:35:55 2008 +0000
tree ba6422054e5b84ba6016f0a5a3e90f70fb94c42d
parent 69cedcbcece7e1138c77aac5b34a1377006254c1

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

lib/Transforms/Scalar/InstructionCombining.cpp

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 2afa6c5..66d5326 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -767,8 +767,8 @@
     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);