Get ChiselSim working with CIRCT 1.66+ (#3890) (#3891)

Fix an incorrect assumption in ChiselSim that a 'filelist.f' will exist
that includes all modules, _including blackboxes_, in the design.  Change
this to try to also copy files from the black box filelist.  This makes
ChiselSim work with CIRCT 1.66 and earlier (which put everything in
'filelist.f') and CIRCT 1.66+ (which does not include blackboxes in
'filelist.f').

Note that this is intended as a temporary solution until FIRRTL has a rock
solid ABI that is implemented by CIRCT where all modules can be discovered
under an arbitrary public module.

See CIRCT changes here: llvm/circt#6729

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>
(cherry picked from commit 9448d32)

Co-authored-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>

src/main/scala/chisel3/simulator/package.scala

@@ -36,25 +36,38 @@ package object simulator {
         )
       )
 
-      // Move the relevant files over to primary-sources
-      val filelist =
-        new java.io.BufferedReader(new java.io.FileReader(s"${workspace.supportArtifactsPath}/filelist.f"))
-      try {
-        filelist.lines().forEach { immutableFilename =>
-          var filename = immutableFilename
-          /// Some files are provided as absolute paths
-          if (filename.startsWith(workspace.supportArtifactsPath)) {
-            filename = filename.substring(workspace.supportArtifactsPath.length + 1)
+      // Move the files indicated by a filelist.
+      def moveFiles(filename: String) = {
+        val filelist = new java.io.BufferedReader(new java.io.FileReader(filename))
+        try {
+          filelist.lines().forEach { immutableFilename =>
+            var filename = immutableFilename
+            /// Some files are provided as absolute paths
+            if (filename.startsWith(workspace.supportArtifactsPath)) {
+              filename = filename.substring(workspace.supportArtifactsPath.length + 1)
+            }
+            java.nio.file.Files.move(
+              java.nio.file.Paths.get(s"${workspace.supportArtifactsPath}/$filename"),
+              java.nio.file.Paths.get(s"${workspace.primarySourcesPath}/$filename")
+            )
           }
-          java.nio.file.Files.move(
-            java.nio.file.Paths.get(s"${workspace.supportArtifactsPath}/$filename"),
-            java.nio.file.Paths.get(s"${workspace.primarySourcesPath}/$filename")
-          )
+        } finally {
+          filelist.close()
         }
-      } finally {
-        filelist.close()
       }
 
+      // Move a file in a filelist which may not exist.
+      def maybeMoveFiles(filename: String) = try {
+        moveFiles(filename)
+      } catch {
+        case _ @(_: java.nio.file.NoSuchFileException | _: java.io.FileNotFoundException) =>
+      }
+
+      // Move files indicated by 'filelist.f' (which must exist).  Move files
+      // indicated by a black box filelist (which may exist).
+      moveFiles(s"${workspace.supportArtifactsPath}/filelist.f")
+      maybeMoveFiles(s"${workspace.supportArtifactsPath}/firrtl_black_box_resource_files.f")
+
       // Initialize Module Info
       val dut = someDut.get
       val ports = {