Define equals manually for Swift JitInterface InlineArray types.

src/coreclr/tools/Common/JitInterface/CorInfoTypes.cs

@@ -1529,6 +1529,47 @@
 
         public nint numLoweredElements;
 
+        public override bool Equals(object obj)
+        {
+            if (obj is not CORINFO_SWIFT_LOWERING other)
+            {
+                return false;
+            }
+
+            if (byReference != other.byReference)
+            {
+                return false;
+            }
+
+            // If both are by-ref, the rest of the bits mean nothing.
+            if (byReference)
+            {
+                return true;
+            }
+
+            return LoweredElements.Slice(0, (int)numLoweredElements).SequenceEqual(other.LoweredElements.Slice(0, (int)other.numLoweredElements);
+                && Offsets.Slice(0, (int)numLoweredElements).SequenceEqual(other.Offsets).Slice(0, (int)other.numLoweredElements);
+        }
+
+        public override int GetHashCode()
+        {
+            HashCode code = new HashCode();
+            code.Add(byReference);
+
+            if (byReference)
+            {
+                return code.ToHashCode();
+            }
+
+            for (int i = 0; i < numLoweredElements; i++)
+            {
+                code.Add(LoweredElements[i]);
+                code.Add(Offsets[i]);
+            }
+
+            return code.ToHashCode();
+        }
+
         // Override for a better unit test experience
         public override string ToString()
         {