Deprecate InstanceGraph (#1800)

* InstanceKeyGraph: add staticInstanceCount, getGraph and getChildrenInstanceMap

* InstanceKeyGraph: reachableModules, unreachableModules, lowestCommonAncestor and fullHierarchy

* Replace usage of InstanceGraph with InstanceKeyGraph

Also deprecates all unused methods.

* WiringUtils: make new version of sinksToSources package private

This will make our live easier next time we need to change it.

* CircuitGraph: use InstanceKeyGraph

* InstanceKeyGraphSpec: respect maximum line width

* InstanceKeyGraph: make constructor private

* InstanceKeyGraph: move lowestCommonAncestor function to Wiring

* WiringUtils: update deprecation message

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/scala/firrtl/transforms/DeadCodeElimination.scala b/src/main/scala/firrtl/transforms/DeadCodeElimination.scala
index f9e35818..c883bdfb 100644
--- a/src/main/scala/firrtl/transforms/DeadCodeElimination.scala
+++ b/src/main/scala/firrtl/transforms/DeadCodeElimination.scala
@@ -6,7 +6,7 @@ import firrtl.ir._
 import firrtl.passes._
 import firrtl.annotations._
 import firrtl.graph._
-import firrtl.analyses.InstanceGraph
+import firrtl.analyses.InstanceKeyGraph
 import firrtl.Mappers._
 import firrtl.Utils.{throwInternalError, kind}
 import firrtl.MemoizedHash._
@@ -314,7 +314,7 @@ class DeadCodeElimination extends Transform
           doTouchExtMods: Set[String]): CircuitState = {
     val c = state.circuit
     val moduleMap = c.modules.map(m => m.name -> m).toMap
-    val iGraph = new InstanceGraph(c)
+    val iGraph = InstanceKeyGraph(c)
     val moduleDeps = iGraph.graph.getEdgeMap.map({ case (k,v) =>
       k.module -> v.map(i => i.name -> i.module).toMap
     })