Change file name ReplacesSubAccesses ReplaceAccess

1 files changed, 27 insertions, 0 deletions

diff --git a/src/main/scala/firrtl/passes/ReplaceAccesses.scala b/src/main/scala/firrtl/passes/ReplaceAccesses.scala
new file mode 100644
index 00000000..ce95be13
--- /dev/null
+++ b/src/main/scala/firrtl/passes/ReplaceAccesses.scala
@@ -0,0 +1,27 @@
+package firrtl.passes
+
+import firrtl.ir._
+import firrtl.{WRef, WSubAccess, WSubIndex, WSubField}
+import firrtl.Mappers._
+import firrtl.Utils._
+import firrtl.WrappedExpression._
+import firrtl.Namespace
+import scala.collection.mutable
+
+
+/** Replaces constant [[firrtl.WSubAccess]] with [[firrtl.WSubIndex]]
+  * TODO Fold in to High Firrtl Const Prop
+  */
+object ReplaceAccesses extends Pass {
+  def name = "Replace Accesses"
+
+  def run(c: Circuit): Circuit = {
+    def onStmt(s: Statement): Statement = s map onStmt map onExp
+    def onExp(e: Expression): Expression = e match {
+      case WSubAccess(e, UIntLiteral(value, width), t, g) => WSubIndex(e, value.toInt, t, g)
+      case e => e map onExp
+    }
+  
+    c copy (modules = c.modules map (_ map onStmt))
+  }
+}