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-rw-r--r--src/main/scala/firrtl/passes/CheckChirrtl.scala6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/main/scala/firrtl/passes/CheckChirrtl.scala b/src/main/scala/firrtl/passes/CheckChirrtl.scala
index 355f728e..579dba30 100644
--- a/src/main/scala/firrtl/passes/CheckChirrtl.scala
+++ b/src/main/scala/firrtl/passes/CheckChirrtl.scala
@@ -4,14 +4,16 @@ package firrtl.passes
import firrtl.Transform
import firrtl.ir._
-import firrtl.options.{Dependency, PreservesAll}
+import firrtl.options.Dependency
-object CheckChirrtl extends Pass with CheckHighFormLike with PreservesAll[Transform] {
+object CheckChirrtl extends Pass with CheckHighFormLike {
override val optionalPrerequisiteOf = firrtl.stage.Forms.ChirrtlForm ++
Seq( Dependency(CInferTypes),
Dependency(CInferMDir),
Dependency(RemoveCHIRRTL) )
+ override def invalidates(a: Transform) = false
+
def errorOnChirrtl(info: Info, mname: String, s: Statement): Option[PassException] = None
}