Add optimization in GetHashCode for Int16 and SByte (#21652)

diff --git a/src/System.Private.CoreLib/shared/System/Int16.cs b/src/System.Private.CoreLib/shared/System/Int16.cs
index bb5a91b..37e1639 100644 (file)
--- a/src/System.Private.CoreLib/shared/System/Int16.cs
+++ b/src/System.Private.CoreLib/shared/System/Int16.cs
@@ -63,7 +63,7 @@ namespace System
         // Returns a HashCode for the Int16
         public override int GetHashCode()
         {
-            return ((int)((ushort)m_value) | (((int)m_value) << 16));
+            return m_value;
         }
 
 

diff --git a/src/System.Private.CoreLib/shared/System/SByte.cs b/src/System.Private.CoreLib/shared/System/SByte.cs
index c3bc386..0ebe882 100644 (file)
--- a/src/System.Private.CoreLib/shared/System/SByte.cs
+++ b/src/System.Private.CoreLib/shared/System/SByte.cs
@@ -66,7 +66,7 @@ namespace System
         // Gets a hash code for this instance.
         public override int GetHashCode()
         {
-            return ((int)m_value ^ (int)m_value << 8);
+            return m_value;
         }