Fixed zero width perf bug #502

Now remove DefNodes of zero width
Don't deeply walk nodes (was the source of the bug)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/test/scala/firrtlTests/ZeroWidthTests.scala b/src/test/scala/firrtlTests/ZeroWidthTests.scala
index 53fae73f..5cb7e532 100644
--- a/src/test/scala/firrtlTests/ZeroWidthTests.scala
+++ b/src/test/scala/firrtlTests/ZeroWidthTests.scala
@@ -93,7 +93,7 @@ class ZeroWidthTests extends FirrtlFlatSpec {
         |    skip""".stripMargin
       (parse(exec(input)).serialize) should be (parse(check).serialize)
   }
-  "Node with <0>" should "be given zero" in {
+  "Node with <0>" should "be removed" in {
     val input =
       """circuit Top :
         |  module Top :
@@ -102,7 +102,7 @@ class ZeroWidthTests extends FirrtlFlatSpec {
     val check =
       """circuit Top :
         |  module Top :
-        |    node x = UInt(0)""".stripMargin
+        |    skip""".stripMargin
       (parse(exec(input)).serialize) should be (parse(check).serialize)
   }
 }