Fix typo

Author: MacDue

llvm/include/llvm/CodeGen/SelectionDAG.h

@@ -455,7 +455,7 @@ class SelectionDAG {
   // Maximum depth for recursive analysis such as computeKnownBits, etc.
   static constexpr unsigned MaxRecursionDepth = 6;
 
-  // Returns the maximum depth for SDNode->hasPredecessor() like searches.
+  // Returns the maximum steps for SDNode->hasPredecessor() like searches.
   static unsigned getHasPredecessorMaxSteps();
 
   explicit SelectionDAG(const TargetMachine &TM, CodeGenOptLevel);