From 3eaa41455a4c32bd7bcbd9e73dc7df2e03d2d31c Mon Sep 17 00:00:00 2001
From: Serge Panev <spanev@nvidia.com>
Date: Fri, 12 Jun 2020 21:50:05 -0700
Subject: [PATCH] Remove check for subgraph with cycles

Signed-off-by: Serge Panev <spanev@nvidia.com>
---
 src/operator/subgraph/build_subgraph.cc | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/operator/subgraph/build_subgraph.cc b/src/operator/subgraph/build_subgraph.cc
index 413395c3b74f..f95f1f4e670b 100644
--- a/src/operator/subgraph/build_subgraph.cc
+++ b/src/operator/subgraph/build_subgraph.cc
@@ -276,10 +276,6 @@ bool LabelSubgraph(const nnvm::Graph& g, SubgraphSelectorV2Ptr subgraph_selector
 
   if (excluded_node_id != -1) {
     CHECK_LT(excluded_node_id, static_cast<int>(simple_nodes.size()));
-    CHECK_NE(excluded_node_id, static_cast<int>(snid))
-      << "A cycle is found in the computational graph between nodes "
-      << simple_nodes[excluded_node_id]->node->attrs.name << " and "
-      << simple_nodes[snid]->node->attrs.name;
     excluded_nodes->insert(simple_nodes[excluded_node_id].get());
     ResetNodeLabels(g, simple_nodes, subgraph_nodes);
     return false;