From 34a3b0f5fa7d62d0c57e3b02025fbac4be632aef Mon Sep 17 00:00:00 2001
From: Ian Wong <yiheng.wang@intel.com>
Date: Fri, 29 Sep 2017 13:23:31 +0800
Subject: [PATCH] Refine scheduler (#1607)

don't execute relevant nodes in forward/backward
fix a bug when handle const node