diff options
Diffstat (limited to 'src/main/scala/firrtl/passes/ZeroLengthVecs.scala')
| -rw-r--r-- | src/main/scala/firrtl/passes/ZeroLengthVecs.scala | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/main/scala/firrtl/passes/ZeroLengthVecs.scala b/src/main/scala/firrtl/passes/ZeroLengthVecs.scala index 14fcd387..39c127de 100644 --- a/src/main/scala/firrtl/passes/ZeroLengthVecs.scala +++ b/src/main/scala/firrtl/passes/ZeroLengthVecs.scala @@ -6,7 +6,7 @@ import firrtl._ import firrtl.ir._ import firrtl.Mappers._ import firrtl.PrimOps._ -import firrtl.options.{Dependency, PreservesAll} +import firrtl.options.Dependency /** Handles dynamic accesses to zero-length vectors. * @@ -15,13 +15,15 @@ import firrtl.options.{Dependency, PreservesAll} * @note Removes attaches that become degenerate after zero-length-accessor removal * @note Replaces "source" references to elements of zero-length vectors with always-invalid validif */ -object ZeroLengthVecs extends Pass with PreservesAll[Transform] { +object ZeroLengthVecs extends Pass { override def prerequisites = Seq( Dependency(PullMuxes), Dependency(ResolveKinds), Dependency(InferTypes), Dependency(ExpandConnects) ) + override def invalidates(a: Transform) = false + // Pass in an expression, not just a type, since it's not possible to generate an expression of // interval type with the type alone unless you declare a component private def replaceWithDontCare(toReplace: Expression): Expression = { |