[InstCombine] Fix a comment. (llvm#79422)

Author: mgudim

llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp

@@ -1848,8 +1848,8 @@ Instruction *InstCombinerImpl::foldICmpAndConstant(ICmpInst &Cmp,
       auto NewPred = TrueIfNeg ? CmpInst::ICMP_EQ : CmpInst::ICMP_NE;
       return new ICmpInst(NewPred, X, ConstantInt::getNullValue(X->getType()));
     }
-    // (X & X) <  0 --> X == MinSignedC
-    // (X & X) > -1 --> X != MinSignedC
+    // (X & -X) <  0 --> X == MinSignedC
+    // (X & -X) > -1 --> X != MinSignedC
     if (match(And, m_c_And(m_Neg(m_Value(X)), m_Deferred(X)))) {
       Constant *MinSignedC = ConstantInt::get(
           X->getType(),