[XLA] Add inequality operator to Comparison.

PiperOrigin-RevId: 507842166

Author: tensorflower-gardener

tensorflow/compiler/xla/comparison_util.h

@@ -88,14 +88,6 @@ class Comparison {
   // targets may support total order floating point type comparisons.
   explicit Comparison(Direction dir, PrimitiveType type, Order order);
 
-  // Two comparisons are equivalent iff they have the same direction, precision,
-  // and ordering.
-  bool operator==(const Comparison& other) const {
-    return GetDirection() == other.GetDirection() &&
-           GetPrimitiveType() == other.GetPrimitiveType() &&
-           GetOrder() == other.GetOrder();
-  }
-
   // Returns a comparison with a primitive type matching the Comparison::Type
   // and using a default bit width of 32. For example,
   // Comparison(Direction::kLt, Type::kFloat).PrimitiveType()  /* F32 */
@@ -257,6 +249,18 @@ auto LessThanByKey(KeyFn&& key_fn) {
   return [=](const auto& a, const auto& b) { return key_fn(a) < key_fn(b); };
 }
 
+// Two comparisons are equivalent iff they have the same direction, precision,
+// and ordering.
+inline bool operator==(const Comparison& a, const Comparison& b) {
+  return a.GetDirection() == b.GetDirection() &&
+         a.GetPrimitiveType() == b.GetPrimitiveType() &&
+         a.GetOrder() == b.GetOrder();
+}
+
+inline bool operator!=(const Comparison& a, const Comparison& b) {
+  return !(a == b);
+}
+
 }  // namespace xla
 
 #endif  // TENSORFLOW_COMPILER_XLA_COMPARISON_UTIL_H_