Convert PreservesAll to explicit invalidates=false

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

1 files changed, 4 insertions, 2 deletions

diff --git a/src/main/scala/firrtl/options/phases/AddDefaults.scala b/src/main/scala/firrtl/options/phases/AddDefaults.scala
index 79089194..9777aff0 100644
--- a/src/main/scala/firrtl/options/phases/AddDefaults.scala
+++ b/src/main/scala/firrtl/options/phases/AddDefaults.scala
@@ -3,19 +3,21 @@
 package firrtl.options.phases
 
 import firrtl.AnnotationSeq
-import firrtl.options.{Dependency, Phase, PreservesAll, TargetDirAnnotation}
+import firrtl.options.{Dependency, Phase, TargetDirAnnotation}
 
 /** Add default annotations for a [[Stage]]
   *
   * This currently only adds a [[TargetDirAnnotation]]. This isn't necessary for a [[StageOptionsView]], but downstream
   * tools may expect a [[TargetDirAnnotation]] to exist.
   */
-class AddDefaults extends Phase with PreservesAll[Phase] {
+class AddDefaults extends Phase {
 
   override def prerequisites = Seq(Dependency[GetIncludes], Dependency[ConvertLegacyAnnotations])
 
   override def optionalPrerequisiteOf = Seq.empty
 
+  override def invalidates(a: Phase) = false
+
   def transform(annotations: AnnotationSeq): AnnotationSeq = {
     val td = annotations.collectFirst{ case a: TargetDirAnnotation => a}.isEmpty