update inline transform and testcases

1 files changed, 6 insertions, 2 deletions

diff --git a/src/main/scala/firrtl/analyses/InstanceGraph.scala b/src/main/scala/firrtl/analyses/InstanceGraph.scala
index 1c6ada4e..22f40359 100644
--- a/src/main/scala/firrtl/analyses/InstanceGraph.scala
+++ b/src/main/scala/firrtl/analyses/InstanceGraph.scala
@@ -70,8 +70,12 @@ class InstanceGraph(c: Circuit) {
     * @return a Seq[ Seq[WDefInstance] ] of absolute instance paths
     */
   def findInstancesInHierarchy(module: String): Seq[Seq[WDefInstance]] = {
-    val instances = graph.getVertices.filter(_.module == module).toSeq
-    instances flatMap { i => fullHierarchy(i) }
+    if (instantiated(module)) {
+      val instances = graph.getVertices.filter(_.module == module).toSeq
+      instances flatMap { i => fullHierarchy(i) }
+    } else {
+      Nil
+    }
   }
 
   /** An [[firrtl.graph.EulerTour EulerTour]] representation of the [[firrtl.graph.DiGraph DiGraph]] */