code: def reg_iou(x1, y1, x2, y2, dx1, dy1, dx2, dy2):
      """Bounding box regression function"""
      pred_x1 = x1 + dx1
      pred_y1 = y1 + dy1
      pred_x2 = x2 + dx2
      pred_y2 = y2 + dy2
      return pred_x1, pred_y1, pred_x2, pred_y2
  
file_path: tvm/python/tvm/topi/vision/rcnn/proposal.py
imports: import math
  import tvm
  from tvm import te
  from ...utils import get_const_tuple, get_const_int
  from ...sort import argsort
label_desc: Use image node_id 3 for calling a global function with example usage: reg_iou(x1, y1, x2, y2, dx1, dy1, dx2, dy2) and returns: pred_x1,  pred_y1,  pred_x2,  pred_y2