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-rw-r--r--src/main/scala/firrtl/transforms/OptimizationAnnotations.scala3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/main/scala/firrtl/transforms/OptimizationAnnotations.scala b/src/main/scala/firrtl/transforms/OptimizationAnnotations.scala
index 10163b72..e817571a 100644
--- a/src/main/scala/firrtl/transforms/OptimizationAnnotations.scala
+++ b/src/main/scala/firrtl/transforms/OptimizationAnnotations.scala
@@ -9,6 +9,9 @@ import firrtl.passes.PassException
/** Indicate that DCE should not be run */
case object NoDCEAnnotation extends NoTargetAnnotation
+/** Indicate that ConstantPropagation should not be run */
+case object NoConstantPropagationAnnotation extends NoTargetAnnotation
+
/** Lets an annotation mark its ReferenceTarget members as DontTouch
*
* This permits a transform to run and remove its associated annotations,