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/CheckHighForm.scala b/src/main/scala/firrtl/passes/CheckHighForm.scala
index 5ca5cd54..889cdae2 100644
--- a/src/main/scala/firrtl/passes/CheckHighForm.scala
+++ b/src/main/scala/firrtl/passes/CheckHighForm.scala
@@ -7,7 +7,7 @@ import firrtl.ir._
 import firrtl.PrimOps._
 import firrtl.Utils._
 import firrtl.traversals.Foreachers._
-import firrtl.options.{Dependency, PreservesAll}
+import firrtl.options.Dependency
 
 trait CheckHighFormLike { this: Pass =>
   type NameSet = collection.mutable.HashSet[String]
@@ -280,7 +280,7 @@ trait CheckHighFormLike { this: Pass =>
   }
 }
 
-object CheckHighForm extends Pass with CheckHighFormLike with PreservesAll[Transform] {
+object CheckHighForm extends Pass with CheckHighFormLike {
 
   override def prerequisites = firrtl.stage.Forms.WorkingIR
 
@@ -292,6 +292,8 @@ object CheckHighForm extends Pass with CheckHighFormLike with PreservesAll[Trans
          Dependency[passes.InferWidths],
          Dependency[transforms.InferResets] )
 
+  override def invalidates(a: Transform) = false
+
   class IllegalChirrtlMemException(info: Info, mname: String, name: String) extends PassException(
     s"$info: [module $mname] Memory $name has not been properly lowered from Chirrtl IR.")