Underlying classes for enum entries.

compiler/testData/ir/irText/classes/enum.kt

@@ -6,4 +6,33 @@ enum class TestEnum2(val x: Int) {
     TEST1(1),
     TEST2(2),
     TEST3(3)
+}
+
+enum class TestEnum3 {
+    TEST {
+        override fun foo() {
+            println("Hello, world!")
+        }
+    }
+    ;
+    abstract fun foo()
+}
+
+enum class TestEnum4(val x: Int) {
+    TEST1(1) {
+        override fun foo() {
+            println(TEST1)
+        }
+    },
+    TEST2(2) {
+        val z: Int
+        init {
+            z = x
+        }
+        override fun foo() {
+            println(TEST2)
+        }
+    }
+    ;
+    abstract fun foo()
 }

compiler/testData/ir/irText/classes/enum.txt

@@ -25,3 +25,55 @@ FILE /enum.kt
     ENUM_ENTRY enum entry TEST3
       init: ENUM_CONSTRUCTOR_CALL TestEnum2 TEST3
         x: CONST Int type=kotlin.Int value='3'
+  CLASS ENUM_CLASS TestEnum3
+    FUN private constructor TestEnum3()
+      BLOCK_BODY
+        ENUM_CONSTRUCTOR_CALL Enum super
+    ENUM_ENTRY enum entry TEST
+      init: ENUM_CONSTRUCTOR_CALL TEST TEST
+      class: CLASS ENUM_ENTRY TEST
+        FUN private constructor TEST()
+          BLOCK_BODY
+            ENUM_CONSTRUCTOR_CALL TestEnum3 super
+        FUN public open override /*1*/ fun foo(): kotlin.Unit
+          BLOCK_BODY
+            CALL .println type=kotlin.Unit operator=null
+              message: CONST String type=kotlin.String value='Hello, world!'
+    FUN public abstract fun foo(): kotlin.Unit
+  CLASS ENUM_CLASS TestEnum4
+    FUN private constructor TestEnum4(/*0*/ x: kotlin.Int)
+      BLOCK_BODY
+        ENUM_CONSTRUCTOR_CALL Enum super
+        SET_BACKING_FIELD x type=kotlin.Unit operator=null
+          GET_VAR x type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+    PROPERTY public final val x: kotlin.Int
+      EXPRESSION_BODY
+        GET_VAR x type=kotlin.Int operator=INITIALIZE_PROPERTY_FROM_PARAMETER
+    ENUM_ENTRY enum entry TEST1
+      init: ENUM_CONSTRUCTOR_CALL TEST1 TEST1
+      class: CLASS ENUM_ENTRY TEST1
+        FUN private constructor TEST1()
+          BLOCK_BODY
+            ENUM_CONSTRUCTOR_CALL TestEnum4 super
+              x: CONST Int type=kotlin.Int value='1'
+        FUN public open override /*1*/ fun foo(): kotlin.Unit
+          BLOCK_BODY
+            CALL .println type=kotlin.Unit operator=null
+              message: GET_ENUM_VALUE TEST1 type=TestEnum4
+    ENUM_ENTRY enum entry TEST2
+      init: ENUM_CONSTRUCTOR_CALL TEST2 TEST2
+      class: CLASS ENUM_ENTRY TEST2
+        FUN private constructor TEST2()
+          BLOCK_BODY
+            ENUM_CONSTRUCTOR_CALL TestEnum4 super
+              x: CONST Int type=kotlin.Int value='2'
+            BLOCK type=kotlin.Unit operator=null
+              SET_BACKING_FIELD z type=kotlin.Unit operator=null
+                CALL .<get-x> type=kotlin.Int operator=GET_PROPERTY
+                  $this: THIS enum entry TEST2 type=TestEnum4.TEST2
+        PROPERTY public final val z: kotlin.Int
+        FUN public open override /*1*/ fun foo(): kotlin.Unit
+          BLOCK_BODY
+            CALL .println type=kotlin.Unit operator=null
+              message: GET_ENUM_VALUE TEST2 type=TestEnum4
+    FUN public abstract fun foo(): kotlin.Unit