Clean up comments

Author: Mel-Chen

llvm/include/llvm/Analysis/IVDescriptors.h

@@ -53,11 +53,11 @@ enum class RecurKind {
   FAnyOf,   ///< Any_of reduction with select(fcmp(),x,y) where one of (x,y) is
             ///< loop invariant, and both x and y are integer type.
   IFindLastIV, ///< FindLast reduction with select(icmp(),x,y) where one of
-               ///< (x,y) is increasing loop induction PHI, and both x and y are
+               ///< (x,y) is increasing loop induction, and both x and y are
                ///< integer type.
   FFindLastIV ///< FindLast reduction with select(fcmp(),x,y) where one of (x,y)
-              ///< is increasing loop induction PHI, and both x and y are
-              ///< integer type.
+              ///< is increasing loop induction, and both x and y are integer
+              ///< type.
   // TODO: Any_of and FindLast reduction need not be restricted to integer type
   // only.
 };