Use utility methods to compute AttrValue hash code and check for equality.

PiperOrigin-RevId: 196531355

1 files changed, 6 insertions, 0 deletions

diff --git a/tensorflow/core/lib/hash/hash.h b/tensorflow/core/lib/hash/hash.h
index 3f85303c0f..737d23f699 100644
--- a/tensorflow/core/lib/hash/hash.h
+++ b/tensorflow/core/lib/hash/hash.h
@@ -44,6 +44,12 @@ inline uint64 Hash64Combine(uint64 a, uint64 b) {
   return a ^ (b + 0x9e3779b97f4a7800ULL + (a << 10) + (a >> 4));
 }
 
+// Combine two hashes in an order-independent way. This operation should be
+// associative and compute the same hash for a collection of elements
+// independent of traversal order. Note that it is better to combine hashes
+// symmetrically with addition rather than XOR, since (x^x) == 0 but (x+x) != 0.
+inline uint64 Hash64CombineUnordered(uint64 a, uint64 b) { return a + b; }
+
 // Hash functor suitable for use with power-of-two sized hashtables.  Use
 // instead of std::hash<T>.
 //