Use large 64 bits kMul for 32 bits platforms as well.

goldvitaly · copybara-github · commit 93cb76d60f8b · 2025-04-23T09:33:31.000-07:00
That improves hash quality and make it easier to maintain 64 and 32 bits hash quality.

PiperOrigin-RevId: 750621032
Change-Id: Ic6c2da6fc40fd39e7157a244f2202bb3dcea66d6
diff --git a/absl/hash/internal/hash.h b/absl/hash/internal/hash.h
@@ -1081,8 +1081,7 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
   };
 
   static constexpr uint64_t kMul =
-  sizeof(size_t) == 4 ? uint64_t{0xcc9e2d51}
-                      : uint64_t{0xdcb22ca68cb134ed};
+   uint64_t{0xdcb22ca68cb134ed};
 
   template <typename T>
   using IntegralFastPath =
