Method DropMaxLayer

oneflow/core/auto_parallel/sbp_node.cpp:565–567

Drop down the maximum layer with the minimum layer form consumer

// Drop down the maximum layer with the minimum layer form consumer
void SbpNode::DropMaxLayer(int32_t upper_bound) {
  if (upper_bound < max_layer_ || max_layer_ < 0) { max_layer_ = upper_bound; }
}

// Set max_layer_ = min_layer_ if this node does not have any consumer
// This is the end of the whole graph