code: def relu_bwd(g, x):
      return torch.where(x >= 0, g, 0.0).to(dtype=x.dtype)
  
imports: import math
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 5 for calling a global function with example usage: relu_bwd(g, x) and returns: torch