1 files changed, 23 insertions, 0 deletions
diff --git a/test/files/jvm/unreachable/Test.scala b/test/files/jvm/unreachable/Test.scala
new file mode 100644
index 0000000000..3f520eb106
--- /dev/null
+++ b/test/files/jvm/unreachable/Test.scala
@@ -0,0 +1,23 @@
+import scala.tools.partest.BytecodeTest
+import scala.tools.asm
+import asm.tree.InsnList
+import scala.collection.JavaConverters._
+
+object Test extends BytecodeTest {
+  def show: Unit = {
+    val classNode = loadClassNode("Foo_1")
+    // Foo_1 is full of unreachable code which if not elimintated
+    // will result in NOPs as can be confirmed by adding -Ydisable-unreachable-prevention
+    // to Foo_1.flags
+    for (methodNode <- classNode.methods.asScala) {
+      val got = count(methodNode.instructions, asm.Opcodes.NOP)
+      if (got != 0) println(s"Found $got NOP(s) in ${methodNode.name}")
+    }
+  }
+
+  def count(insnList: InsnList, opcode: Int): Int = {
+    def isNop(node: asm.tree.AbstractInsnNode): Boolean =
+      (node.getOpcode == opcode)
+    insnList.iterator.asScala.count(isNop)
+  }
+}
+\ No newline at end of file