// T19 interface { T18; T18 }

        // T20 interface { T19; T19 }
        // T21 interface { T20; T20 }
        // T22 interface { T21; T21 }
        // T23 interface { T22; T22 }
        // T24 interface { T23; T23 }
        // T25 interface { T24; T24 }
        // T26 interface { T25; T25 }
        // T27 interface { T26; T26 }
        // T28 interface { T27; T27 }
        // T29 interface { T28; T28 }

			Valu("t20", OpCtz64, c.config.Types.Int64, 0, nil, "v2"),
			Valu("t21", OpSlicemask, c.config.Types.Int64, 0, nil, "t20"),
			Valu("t22", OpIsNonNil, c.config.Types.Int64, 0, nil, "v2"),
			Valu("t23", OpNot, c.config.Types.Bool, 0, nil, "v4"),
			Valu("t24", OpEq64, c.config.Types.Bool, 0, nil, "v1", "v2"),
			Valu("t25", OpLess64, c.config.Types.Bool, 0, nil, "v1", "v2"),