When by enum:

Generate TABLESWITCH/LOOKUPSWITCH bytecode command in case of "when" by enum entries

compiler/testData/codegen/boxWithStdlib/whenEnumOptimization/enumInsideClassObject.kt

@@ -0,0 +1,29 @@
+import kotlin.test.assertEquals
+
+class A {
+    class object {
+        enum class Season {
+            WINTER
+            SPRING
+            SUMMER
+            AUTUMN
+        }
+    }
+}
+
+fun foo(x : A.Season) : String {
+    return when (x) {
+        A.Season.WINTER -> "winter"
+        A.Season.SPRING -> "spring"
+        A.Season.SUMMER -> "summer"
+        else -> "other"
+    }
+}
+
+fun box() : String {
+    assertEquals("winter", foo(A.Season.WINTER))
+    assertEquals("spring", foo(A.Season.SPRING))
+    assertEquals("summer", foo(A.Season.SUMMER))
+    assertEquals("other", foo(A.Season.AUTUMN))
+    return "OK"
+}