Rebase, and remove isArithmeticRecurrenceKind

Author: Mel-Chen

llvm/include/llvm/Analysis/IVDescriptors.h

@@ -230,9 +230,6 @@ class RecurrenceDescriptor {
   /// Returns true if the recurrence kind is a floating point kind.
   static bool isFloatingPointRecurrenceKind(RecurKind Kind);
 
-  /// Returns true if the recurrence kind is arithmetic.
-  static bool isArithmeticRecurrenceKind(RecurKind Kind);
-
   /// Returns true if the recurrence kind is an integer min/max kind.
   static bool isIntMinMaxRecurrenceKind(RecurKind Kind) {
     return Kind == RecurKind::UMin || Kind == RecurKind::UMax ||

llvm/lib/Analysis/IVDescriptors.cpp

@@ -62,11 +62,6 @@ bool RecurrenceDescriptor::isFloatingPointRecurrenceKind(RecurKind Kind) {
   return (Kind != RecurKind::None) && !isIntegerRecurrenceKind(Kind);
 }
 
-bool RecurrenceDescriptor::isArithmeticRecurrenceKind(RecurKind Kind) {
-  return (Kind != RecurKind::None) && !isMinMaxRecurrenceKind(Kind) &&
-         !isAnyOfRecurrenceKind(Kind);
-}
-
 /// Determines if Phi may have been type-promoted. If Phi has a single user
 /// that ANDs the Phi with a type mask, return the user. RT is updated to
 /// account for the narrower bit width represented by the mask, and the AND