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, 3 insertions, 3 deletions

diff --git a/src/main/scala/firrtl/transforms/ConstantPropagation.scala b/src/main/scala/firrtl/transforms/ConstantPropagation.scala
index c3c615e0..ce36dd72 100644
--- a/src/main/scala/firrtl/transforms/ConstantPropagation.scala
+++ b/src/main/scala/firrtl/transforms/ConstantPropagation.scala
@@ -11,7 +11,7 @@ import firrtl.Utils._
 import firrtl.Mappers._
 import firrtl.PrimOps._
 import firrtl.graph.DiGraph
-import firrtl.analyses.InstanceGraph
+import firrtl.analyses.InstanceKeyGraph
 import firrtl.annotations.TargetToken.Ref
 import firrtl.options.Dependency
 
@@ -739,8 +739,8 @@ class ConstantPropagation extends Transform with DependencyAPIMigration with Res
 
 
   private def run(c: Circuit, dontTouchMap: Map[OfModule, Set[String]]): Circuit = {
-    val iGraph = new InstanceGraph(c)
-    val moduleDeps = iGraph.getChildrenInstanceMap
+    val iGraph = InstanceKeyGraph(c)
+    val moduleDeps = iGraph.getChildInstanceMap
     val instCount = iGraph.staticInstanceCount
 
     // DiGraph using Module names as nodes, destination of edge is a parent Module