From 370d5b499f9c02c50fbd62f3291a53fbe8aea9b3 Mon Sep 17 00:00:00 2001
From: Adam Izraelevitz
Date: Tue, 25 Dec 2018 11:00:42 -0500
Subject: Performance fix of Uniquify for deep bundles (#980)

---
 src/test/scala/firrtlTests/UniquifySpec.scala | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/test')

diff --git a/src/test/scala/firrtlTests/UniquifySpec.scala b/src/test/scala/firrtlTests/UniquifySpec.scala
index 43d1e733..bf0586f3 100644
--- a/src/test/scala/firrtlTests/UniquifySpec.scala
+++ b/src/test/scala/firrtlTests/UniquifySpec.scala
@@ -283,4 +283,23 @@ class UniquifySpec extends FirrtlFlatSpec {
 
     executeTest(input, expected)
   }
+
+  it should "quickly rename deep bundles" in {
+    def mkType(i: Int): String = {
+      if(i == 0) "UInt<8>" else s"{x: ${mkType(i - 1)}}"
+    }
+
+    val depth = 500
+
+    val input =
+      s"""circuit Test:
+         |  module Test :
+         |    input in: ${mkType(depth)}
+         |    output out: ${mkType(depth)}
+         |    out <= in
+         |""".stripMargin
+
+    val (ms, _) = Utils.time(compileToVerilog(input))
+    (ms < 8000) shouldBe true
+  }
 }
-- 
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