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

compiler/testData/codegen/box/reflection/properties/getDelegate/method/delegateToConst.kt

@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.test.assertEquals
+import kotlin.reflect.jvm.isAccessible
+
+operator fun Any?.getValue(x: Any?, y: Any?): String {
+    return "OK"
+}
+
+val s: String by 1
+
+fun box(): String {
+    assertEquals(1, ::s.apply { isAccessible = true }.getDelegate())
+    return "OK"
+}
+

compiler/testData/codegen/box/reflection/properties/getDelegate/method/delegateToConstProperty.kt

@@ -0,0 +1,18 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.jvm.isAccessible
+import kotlin.test.assertEquals
+
+operator fun Any?.getValue(x: Any?, y: Any?): String {
+    return "OK"
+}
+const val a = "TEXT"
+
+val s: String by a
+
+fun box(): String {
+    assertEquals("TEXT", ::s.apply { isAccessible = true }.getDelegate())
+    return "OK"
+}
+

compiler/testData/codegen/box/reflection/properties/getDelegate/method/delegateToEnum.kt

@@ -0,0 +1,18 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.test.assertEquals
+import kotlin.reflect.jvm.isAccessible
+
+enum class E {
+    OK, NOT_OK
+}
+
+operator fun E.getValue(x: Any?, y: Any?): String = name
+
+val s: String by E.OK
+
+fun box(): String {
+    assertEquals(E.OK, ::s.apply { isAccessible = true }.getDelegate())
+    return "OK"
+}

compiler/testData/codegen/box/reflection/properties/getDelegate/method/delegateToFinalObjectProperty.kt

@@ -0,0 +1,21 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+import kotlin.reflect.jvm.isAccessible
+
+import kotlin.test.assertEquals
+
+object O {
+    val impl = 123
+}
+
+operator fun Any?.getValue(thisRef: Any?, property: KProperty<*>) = "OK"
+
+val s: String by O.impl
+
+fun box(): String {
+    assertEquals(123, ::s.apply { isAccessible = true }.getDelegate())
+    return "OK"
+}

compiler/testData/codegen/box/reflection/properties/getDelegate/method/delegateToFinalProperty.kt

@@ -0,0 +1,18 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.KProperty
+import kotlin.reflect.jvm.isAccessible
+
+import kotlin.test.assertEquals
+
+val impl = 123
+
+operator fun Any?.getValue(thisRef: Any?, property: KProperty<*>) = "OK"
+
+val s: String by impl
+
+fun box(): String {
+    assertEquals(123, ::s.apply { isAccessible = true }.getDelegate())
+    return "OK"
+}

compiler/testData/codegen/box/reflection/properties/getDelegate/method/delegateToSingleton.kt

@@ -0,0 +1,27 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.KProperty
+import kotlin.reflect.jvm.isAccessible
+
+import kotlin.test.assertEquals
+
+object Store {
+    private val map = mutableMapOf<Pair<Any?, KProperty<*>>, String?>()
+
+    operator fun getValue(thisRef: Any?, property: KProperty<*>): String? = map[thisRef to property]
+
+    operator fun setValue(thisRef: Any?, property: KProperty<*>, value: String?) {
+        map[thisRef to property] = value
+    }
+}
+
+object O {
+    var s: String? by Store
+}
+
+fun box(): String  {
+    assertEquals(Store, O::s.apply { isAccessible = true }.getDelegate())
+    return "OK"
+}
+