How to use signal name as variable name in generated code

I have a simple model with an atomic subsystem block.

the signal after the subsystem "Function" is called "x" in the model.

The generated code for the step function is

void untitled1_step(void)
{
  real32_T rtb_Gain;

  /* Outputs for Atomic SubSystem: '<Root>/Function' */

  /* Inport: '<Root>/In1' */
  rtb_Gain = untitled1_Function(untitled1_U.In1);

  /* End of Outputs for SubSystem: '<Root>/Function' */

  /* Outport: '<Root>/Out2' incorporates:
   *  Bias: '<Root>/Bias'
   */
  untitled1_Y.Out2 = rtb_Gain + 2.0F;
}

Embedded coder generate rtb_Gain variable.

However I would like to generate the x variable instead, so that the code became:

void untitled1_step(void)
{
  real32_T rtb_Gain;

  /* Outputs for Atomic SubSystem: '<Root>/Function' */

  /* Inport: '<Root>/In1' */
  x = untitled1_Function(untitled1_U.In1);

  /* End of Outputs for SubSystem: '<Root>/Function' */

  /* Outport: '<Root>/Out2' incorporates:
   *  Bias: '<Root>/Bias'
   */
  untitled1_Y.Out2 = rtb_Gain + 2.0F;
}

Is there any general setting that I can activate to do this?