Added @shared annotation

Author: Franziska Geiger

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/CodecsModuleBuiltins.java

@@ -73,6 +73,7 @@
 import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.dsl.Cached;
+import com.oracle.truffle.api.dsl.Cached.Shared;
 import com.oracle.truffle.api.dsl.Fallback;
 import com.oracle.truffle.api.dsl.GenerateNodeFactory;
 import com.oracle.truffle.api.dsl.ImportStatic;
@@ -341,13 +342,13 @@ Object encode(Object str, @SuppressWarnings("unused") Object errors) {
     abstract static class UnicodeEscapeDecode extends PythonBinaryBuiltinNode {
         @Specialization(guards = "isBytes(bytes)")
         Object encode(VirtualFrame frame, Object bytes, @SuppressWarnings("unused") PNone errors,
-                      @Cached("create()") BytesNodes.ToBytesNode toBytes) {
+                      @Shared("toBytes") @Cached("create()") BytesNodes.ToBytesNode toBytes) {
             return encode(frame, bytes, "", toBytes);
         }
 
         @Specialization(guards = "isBytes(bytes)")
         Object encode(VirtualFrame frame, Object bytes, @SuppressWarnings("unused") String errors,
-                      @Cached("create()") BytesNodes.ToBytesNode toBytes) {
+                      @Shared("toBytes") @Cached("create()") BytesNodes.ToBytesNode toBytes) {
             // for now we'll just parse this as a String, ignoring any error strategies
             PythonCore core = getCore();
             byte[] byteArray = toBytes.execute(frame, bytes);