TFE_TensorHandle* m2 = DoubleTestMatrixTensorHandle3X2(ctx);
  TFE_Op* matmul = MatMulOp(ctx, m1, m2);
  TFE_OpSetDevice(matmul, "/job:localhost/replica:0/task:0/device:CPU:0",
                  status);
  ASSERT_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  TFE_Op* matmul2 = MatMulOp(ctx, m1, m1);
  TFE_OpSetDevice(matmul2, "/job:localhost/replica:0/task:0/device:CPU:0",
                  status);