Use ChiselStage in Tests

This migrates the tests to Chisel 3.4/FIRRTL 1.4. This primarily
involves removing usages of deprecated methods including:

- Remove usages of Driver
- Use ChiselStage methods instead of BackendCompilationUtilities
  methods
- Use Dependency API for custom transforms
- Use extractCause to unpack StackError

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/test/scala/chiselTests/GCD.scala b/src/test/scala/chiselTests/GCD.scala
index 5c9641be..a80670a9 100644
--- a/src/test/scala/chiselTests/GCD.scala
+++ b/src/test/scala/chiselTests/GCD.scala
@@ -3,6 +3,7 @@
 package chiselTests
 
 import chisel3._
+import chisel3.stage.ChiselStage
 import chisel3.testers.BasicTester
 
 class GCD extends Module {
@@ -47,7 +48,7 @@ class GCDSpec extends ChiselPropSpec {
     ( 48,  64,  16))
 
   property("GCD should elaborate") {
-    elaborate { new GCD }
+    ChiselStage.elaborate { new GCD }
   }
 
   property("GCDTester should return the correct result") {