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/passes/CheckWidths.scala b/src/main/scala/firrtl/passes/CheckWidths.scala
index 4f1930c1..382490e7 100644
--- a/src/main/scala/firrtl/passes/CheckWidths.scala
+++ b/src/main/scala/firrtl/passes/CheckWidths.scala
@@ -9,14 +9,16 @@ import firrtl.traversals.Foreachers._
 import firrtl.Utils._
 import firrtl.constraint.IsKnown
 import firrtl.annotations.{CircuitTarget, ModuleTarget, Target, TargetToken}
-import firrtl.options.{Dependency, PreservesAll}
+import firrtl.options.Dependency
 
-object CheckWidths extends Pass with PreservesAll[Transform] {
+object CheckWidths extends Pass {
 
   override def prerequisites = Dependency[passes.InferWidths] +: firrtl.stage.Forms.WorkingIR
 
   override def optionalPrerequisiteOf = Seq(Dependency[transforms.InferResets])
 
+  override def invalidates(a: Transform) = false
+
   /** The maximum allowed width for any circuit element */
   val MaxWidth = 1000000
   val DshlMaxWidth = getUIntWidth(MaxWidth)