KT-23397 Optimize out field for property delegate when it's safe (JVM)

compiler/testData/codegen/box/delegatedProperty/delegateToSingleton/withSideEffectsToEnum.kt

@@ -0,0 +1,22 @@
+// WITH_STDLIB
+// CHECK_BYTECODE_LISTING
+
+var initialized = false
+
+enum class E {
+    X;
+
+    companion object {
+        init {
+            initialized = true
+        }
+    }
+}
+
+operator fun Any?.getValue(x: Any?, y: Any?): String {
+    throw RuntimeException()
+}
+
+val result by E.X
+
+fun box() = if (initialized) "OK" else "FAILURE"