Make WiringTransform remove its used annotations (#774)

* Make WiringTransform remove its used annotations

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/main/scala/firrtl/passes/wiring/WiringTransform.scala b/src/main/scala/firrtl/passes/wiring/WiringTransform.scala
index 9a82f8a0..bb73beb4 100644
--- a/src/main/scala/firrtl/passes/wiring/WiringTransform.scala
+++ b/src/main/scala/firrtl/passes/wiring/WiringTransform.scala
@@ -69,7 +69,10 @@ class WiringTransform extends Transform {
             val wis = sources.foldLeft(Seq[WiringInfo]()) { case (seq, (pin, source)) =>
               seq :+ WiringInfo(source, sinks(pin), pin)
             }
-            transforms(wis).foldLeft(state) { (in, xform) => xform.runTransform(in) }
+            val annosx = state.annotations.filterNot(annos.toSet.contains)
+            transforms(wis)
+              .foldLeft(state) { (in, xform) => xform.runTransform(in) }
+              .copy(annotations = annosx)
           case _ => error("Wrong number of sources or sinks!")
         }
     }