Generate state machine for named functions in their bodies

Inline functions aren't supported yet in the change

 #KT-17585 In Progress

libraries/stdlib/src/kotlin/coroutines/experimental/jvm/internal/CoroutineImpl.kt

@@ -35,7 +35,7 @@ abstract class CoroutineImpl(
     // label == -1 when coroutine cannot be started (it is just a factory object) or has already finished execution
     // label == 0 in initial part of the coroutine
     @JvmField
-    protected var label: Int = if (completion != null) 0 else -1
+    var label: Int = if (completion != null) 0 else -1
 
     private val _context: CoroutineContext? = completion?.context
 
@@ -71,3 +71,35 @@ abstract class CoroutineImpl(
         throw IllegalStateException("create(Any?;Continuation) has not been overridden")
     }
 }
+
+abstract class CoroutineImplForNamedFunction(
+       completion: Continuation<Any?>?
+) : CoroutineImpl(0, completion), Continuation<Any?> {
+    companion object {
+        private const val LAST_BIT_MASK = 1 shl 31
+    }
+
+    @JvmField
+    var data: Any? = null
+
+    @JvmField
+    var exception: Throwable? = null
+
+    fun checkAndFlushLastBit(): Boolean {
+        if (label and LAST_BIT_MASK != 0) {
+            label -= LAST_BIT_MASK
+            return true
+        }
+
+        return false
+    }
+
+    override fun doResume(data: Any?, exception: Throwable?): Any? {
+        this.data = data
+        this.exception = exception
+        this.label = this.label or LAST_BIT_MASK
+        return doResume()
+    }
+
+    protected abstract fun doResume(): Any?
+}