diff options
Diffstat (limited to 'src/main/scala/firrtl/passes/DeadCodeElimination.scala')
| -rw-r--r-- | src/main/scala/firrtl/passes/DeadCodeElimination.scala | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/main/scala/firrtl/passes/DeadCodeElimination.scala b/src/main/scala/firrtl/passes/DeadCodeElimination.scala index cdff1639..8482fe1d 100644 --- a/src/main/scala/firrtl/passes/DeadCodeElimination.scala +++ b/src/main/scala/firrtl/passes/DeadCodeElimination.scala @@ -36,7 +36,7 @@ import annotation.tailrec object DeadCodeElimination extends Pass { def name = "Dead Code Elimination" - private def dceOnce(s: Stmt): (Stmt, Long) = { + private def dceOnce(s: Statement): (Statement, Long) = { val referenced = collection.mutable.HashSet[String]() var nEliminated = 0L @@ -48,16 +48,16 @@ object DeadCodeElimination extends Pass { e } - def checkUse(s: Stmt): Stmt = s map checkUse map checkExpressionUse + def checkUse(s: Statement): Statement = s map checkUse map checkExpressionUse - def maybeEliminate(x: Stmt, name: String) = + def maybeEliminate(x: Statement, name: String) = if (referenced(name)) x else { nEliminated += 1 - Empty() + EmptyStmt } - def removeUnused(s: Stmt): Stmt = s match { + def removeUnused(s: Statement): Statement = s match { case x: DefRegister => maybeEliminate(x, x.name) case x: DefWire => maybeEliminate(x, x.name) case x: DefNode => maybeEliminate(x, x.name) @@ -69,7 +69,7 @@ object DeadCodeElimination extends Pass { } @tailrec - private def dce(s: Stmt): Stmt = { + private def dce(s: Statement): Statement = { val (res, n) = dceOnce(s) if (n > 0) dce(res) else res } |
