1 files changed, 26 insertions, 0 deletions
diff --git a/src/main/scala/firrtl/stage/transforms/ExpandPrepares.scala b/src/main/scala/firrtl/stage/transforms/ExpandPrepares.scala
new file mode 100644
index 00000000..7a0621e4
--- /dev/null
+++ b/src/main/scala/firrtl/stage/transforms/ExpandPrepares.scala
@@ -0,0 +1,26 @@
+// See LICENSE for license details.
+
+package firrtl.stage.transforms
+
+import firrtl.{CircuitState, Transform}
+
+class ExpandPrepares(val underlying: Transform) extends Transform with WrappedTransform {
+
+  /* Assert that this is not wrapping other transforms. */
+  underlying match {
+    case _: WrappedTransform => throw new Exception(
+      s"'ExpandPrepares' must not wrap other 'WrappedTransforms', but wraps '${underlying.getClass.getName}'")
+    case _ =>
+  }
+
+  override def execute(c: CircuitState): CircuitState = {
+    underlying.transform(underlying.prepare(c))
+  }
+
+}
+
+object ExpandPrepares {
+
+  def apply(a: Transform): ExpandPrepares = new ExpandPrepares(a)
+
+}