// Go downstream from `op`.
    // * s1 s2
    auto output_i32_to_f32_convert_op = TryCast<stablehlo::ConvertOp>(
        *op.getResult().user_begin(), /*name=*/"output_i32_to_f32_convert_op");
    if (failed(output_i32_to_f32_convert_op)) return failure();

    auto combined_scale_multiply_op = TryCast<stablehlo::MulOp>(
        *output_i32_to_f32_convert_op->getResult().user_begin(),