1 files changed, 61 insertions, 0 deletions
diff --git a/test/files/run/constant-optimization.scala b/test/files/run/constant-optimization.scala
new file mode 100644
index 0000000000..5d13272f3b
--- /dev/null
+++ b/test/files/run/constant-optimization.scala
@@ -0,0 +1,61 @@
+object Test extends App {
+  def testBothReachable() {
+    val i = util.Random.nextInt
+    val x = if (i % 2 == 0) null else "good"
+    val y = if (x == null) "good" else x + ""
+    println(s"testBothReachable: $y")
+  }
+
+  def testOneReachable() {
+    val i = 1
+    val x = if (i != 1) null else "good"
+    val y = if (x == null) "good" else x + ""
+    println(s"testOneReachable: $y")
+  }
+
+  def testAllReachable() {
+    val i = util.Random.nextInt
+    val y = (i % 2) match {
+      case 0 => "good"
+      case 1 => "good"
+      case _ => "good"
+    }
+    println(s"testAllReachable: $y")
+  }
+
+  def testOneUnreachable() {
+    val i = util.Random.nextInt
+    val x = if (i % 2 == 0) {
+      1
+    } else {
+      2
+    }
+    val y = x match {
+      case 0 => "good"
+      case 1 => "good"
+      case _ => "good"
+    }
+    println(s"testOneUnreachable: $y")
+  }
+
+  def testDefaultUnreachable() {
+    val i = util.Random.nextInt
+    val x = if (i % 2 == 0) {
+      1
+    } else {
+      2
+    }
+    val y = x match {
+      case 1 => "good"
+      case 2 => "good"
+      case _ => "good"
+    }
+    println(s"testDefaultUnreachable: $y")
+  }
+
+  testBothReachable()
+  testOneReachable()
+  testAllReachable()
+  testOneUnreachable()
+  testDefaultUnreachable()
+}