Fix a bug Nate noticed, where we miscompiled a simple testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17157 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 3119e5704401a9fd75c464210f322b9be4b312ce..61acad04f328d86fa582f10a695b14fc352cc2d3 100644 (file)
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -1285,7 +1285,7 @@ Instruction *InstCombiner::OptAndOp(Instruction *Op,
         Constant *AllOne = ConstantIntegral::getAllOnesValue(AndRHS->getType());
         Constant *ShrMask = ConstantExpr::getUShr(AllOne, OpRHS);
         Constant *CI = ConstantExpr::getAnd(AndRHS, ShrMask);
-        if (CI == ShrMask) {          // Masking out bits shifted in.
+        if (CI == AndRHS) {          // Masking out bits shifted in.
           // Make the argument unsigned.
           Value *ShVal = Op->getOperand(0);
           ShVal = InsertCastBefore(ShVal,