message: [Conv2D] fix a bug when a convolution and its input operator use different parallel configuration
diff: @@ -640,7 +640,7 @@ void Conv2D::backward(const FFModel& ff)
  launcher.add_field(0, FID_DATA);
  // regions[1](I/O): input_grad
  launcher.add_region_requirement(
  - RegionRequirement(inputs[0].part_grad, 0/*projection id*/,
  + RegionRequirement(input_grad_lps[0], 0/*projection id*/,
  READ_WRITE, EXCLUSIVE, inputs[0].region_grad));
  launcher.add_field(1, FID_DATA);
  // regions[2](I): output
  