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

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/chain.kt

@@ -0,0 +1,26 @@
+// CHECK_BYTECODE_LISTING
+
+class A {
+    val b = B()
+}
+
+class B {
+    val c = C()
+}
+
+class C {
+    val d = D()
+}
+
+class D {
+    val e = 1
+}
+
+val a = A()
+
+operator fun Int.getValue(thisRef: Any?, property: Any?) =
+    if (this == 1 && thisRef == null) "OK" else "Failed"
+
+val x by a.b.c.d.e
+
+fun box() = x

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/chain.txt

@@ -0,0 +1,44 @@
+@kotlin.Metadata
+public final class A {
+    // source: 'chain.kt'
+    private final @org.jetbrains.annotations.NotNull field b: B
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getB(): B
+}
+
+@kotlin.Metadata
+public final class B {
+    // source: 'chain.kt'
+    private final @org.jetbrains.annotations.NotNull field c: C
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getC(): C
+}
+
+@kotlin.Metadata
+public final class C {
+    // source: 'chain.kt'
+    private final @org.jetbrains.annotations.NotNull field d: D
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getD(): D
+}
+
+@kotlin.Metadata
+public final class ChainKt {
+    // source: 'chain.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static @org.jetbrains.annotations.NotNull field a: A
+    private final static field x$delegate: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getA(): A
+    public final static @org.jetbrains.annotations.NotNull method getValue(p0: int, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getX(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class D {
+    // source: 'chain.kt'
+    private final field e: int
+    public method <init>(): void
+    public final method getE(): int
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/chain_ir.txt

@@ -0,0 +1,44 @@
+@kotlin.Metadata
+public final class A {
+    // source: 'chain.kt'
+    private final @org.jetbrains.annotations.NotNull field b: B
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getB(): B
+}
+
+@kotlin.Metadata
+public final class B {
+    // source: 'chain.kt'
+    private final @org.jetbrains.annotations.NotNull field c: C
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getC(): C
+}
+
+@kotlin.Metadata
+public final class C {
+    // source: 'chain.kt'
+    private final @org.jetbrains.annotations.NotNull field d: D
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getD(): D
+}
+
+@kotlin.Metadata
+public final class ChainKt {
+    // source: 'chain.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static @org.jetbrains.annotations.NotNull field a: A
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getA(): A
+    public final static @org.jetbrains.annotations.NotNull method getValue(p0: int, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+    private static method getX$delegate(): java.lang.Object
+    public final static @org.jetbrains.annotations.NotNull method getX(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class D {
+    // source: 'chain.kt'
+    private final field e: int
+    public method <init>(): void
+    public final method getE(): int
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalInstanceProperty.kt

@@ -0,0 +1,14 @@
+// CHECK_BYTECODE_LISTING
+
+
+class C {
+    val impl = 123
+    val s: String by impl
+}
+
+val c = C()
+
+operator fun Any?.getValue(thisRef: Any?, property: Any?) =
+    if (this == 123 && thisRef == c) "OK" else "Failed"
+
+fun box() = c.s

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalInstanceProperty.txt

@@ -0,0 +1,21 @@
+@kotlin.Metadata
+public final class C {
+    // source: 'delegateToFinalInstanceProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final field impl: int
+    private final field s$delegate: int
+    static method <clinit>(): void
+    public method <init>(): void
+    public final method getImpl(): int
+    public final @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class DelegateToFinalInstancePropertyKt {
+    // source: 'delegateToFinalInstanceProperty.kt'
+    private final static @org.jetbrains.annotations.NotNull field c: C
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getC(): C
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalInstanceProperty_ir.txt

@@ -0,0 +1,21 @@
+@kotlin.Metadata
+public final class C {
+    // source: 'delegateToFinalInstanceProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final field impl: int
+    static method <clinit>(): void
+    public method <init>(): void
+    public final method getImpl(): int
+    private static method getS$delegate(p0: C): java.lang.Object
+    public final @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class DelegateToFinalInstancePropertyKt {
+    // source: 'delegateToFinalInstanceProperty.kt'
+    private final static @org.jetbrains.annotations.NotNull field c: C
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getC(): C
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalObjectProperty.kt

@@ -0,0 +1,12 @@
+// CHECK_BYTECODE_LISTING
+
+object O {
+    val impl = 123
+}
+
+operator fun Any?.getValue(thisRef: Any?, property: Any?) =
+    if (this == 123 && thisRef == null) "OK" else "Failed"
+
+val s: String by O.impl
+
+fun box() = s

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalObjectProperty.txt

@@ -0,0 +1,20 @@
+@kotlin.Metadata
+public final class DelegateToFinalObjectPropertyKt {
+    // source: 'delegateToFinalObjectProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static field s$delegate: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}
+
+@kotlin.Metadata
+public final class O {
+    // source: 'delegateToFinalObjectProperty.kt'
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: O
+    private final static field impl: int
+    static method <clinit>(): void
+    private method <init>(): void
+    public final method getImpl(): int
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalObjectProperty_ir.txt

@@ -0,0 +1,20 @@
+@kotlin.Metadata
+public final class DelegateToFinalObjectPropertyKt {
+    // source: 'delegateToFinalObjectProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    private static method getS$delegate(): java.lang.Object
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}
+
+@kotlin.Metadata
+public final class O {
+    // source: 'delegateToFinalObjectProperty.kt'
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: O
+    private final static field impl: int
+    static method <clinit>(): void
+    private method <init>(): void
+    public final method getImpl(): int
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalProperty.kt

@@ -0,0 +1,10 @@
+// CHECK_BYTECODE_LISTING
+
+val impl = 123
+
+operator fun Any?.getValue(thisRef: Any?, property: Any?) =
+    if (this == 123 && thisRef == null) "OK" else "Failed"
+
+val s: String by impl
+
+fun box() = s

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalProperty.txt

@@ -0,0 +1,12 @@
+@kotlin.Metadata
+public final class DelegateToFinalPropertyKt {
+    // source: 'delegateToFinalProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static field impl: int
+    private final static field s$delegate: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static method getImpl(): int
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/delegateToFinalProperty_ir.txt

@@ -0,0 +1,12 @@
+@kotlin.Metadata
+public final class DelegateToFinalPropertyKt {
+    // source: 'delegateToFinalProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static field impl: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static method getImpl(): int
+    private static method getS$delegate(): java.lang.Object
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/finalPropertyInAnotherFile.kt

@@ -0,0 +1,12 @@
+// CHECK_BYTECODE_LISTING
+
+//FILE file1.kt
+val impl = 123
+
+//FILE file2.kt
+operator fun Any?.getValue(thisRef: Any?, property: Any?) =
+    if (this == 123 && thisRef == null) "OK" else "Failed"
+
+val s: String by impl
+
+fun box() = s

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/finalPropertyInAnotherFile.txt

@@ -0,0 +1,12 @@
+@kotlin.Metadata
+public final class FinalPropertyInAnotherFileKt {
+    // source: 'finalPropertyInAnotherFile.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static field impl: int
+    private final static field s$delegate: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static method getImpl(): int
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/finalPropertyInAnotherFile_ir.txt

@@ -0,0 +1,12 @@
+@kotlin.Metadata
+public final class FinalPropertyInAnotherFileKt {
+    // source: 'finalPropertyInAnotherFile.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static field impl: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static method getImpl(): int
+    private static method getS$delegate(): java.lang.Object
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/initializeContainerOfTopLevelProperties.kt

@@ -0,0 +1,18 @@
+// FILE: 1.kt
+
+var result = "Fail"
+val unused by c
+
+fun box(): String = result
+
+// FILE: 2.kt
+
+class C {
+    init {
+        result = "OK"
+    }
+}
+
+operator fun C.getValue(x: Any?, y: Any?): String = throw IllegalStateException()
+
+val c = C()

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/memberExtensionPropertyAndImportFromObject.kt

@@ -0,0 +1,18 @@
+// CHECK_BYTECODE_LISTING
+
+import O.d
+
+enum class E { X }
+
+object O {
+    val E.d: Delegate get() = Delegate()
+}
+
+class Delegate {
+    operator fun getValue(thisRef: Any?, property: Any?) =
+        if (thisRef == null) "OK" else "Failed"
+}
+
+val result by E.X.d
+
+fun box(): String = result

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/memberExtensionPropertyAndImportFromObject.txt

@@ -0,0 +1,36 @@
+@kotlin.Metadata
+public final class Delegate {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object): java.lang.String
+}
+
+@kotlin.Metadata
+public final enum class E {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    private synthetic final static field $VALUES: E[]
+    public final enum static field X: E
+    static method <clinit>(): void
+    private method <init>(p0: java.lang.String, p1: int): void
+    public static method valueOf(p0: java.lang.String): E
+    public static method values(): E[]
+}
+
+@kotlin.Metadata
+public final class MemberExtensionPropertyAndImportFromObjectKt {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static @org.jetbrains.annotations.NotNull field result$delegate: Delegate
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getResult(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class O {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: O
+    static method <clinit>(): void
+    private method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getD(@org.jetbrains.annotations.NotNull p0: E): Delegate
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/memberExtensionPropertyAndImportFromObject_ir.txt

@@ -0,0 +1,37 @@
+@kotlin.Metadata
+public final class Delegate {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object): java.lang.String
+}
+
+@kotlin.Metadata
+public final enum class E {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    private synthetic final static field $VALUES: E[]
+    public final enum static field X: E
+    private synthetic final static method $values(): E[]
+    static method <clinit>(): void
+    private method <init>(p0: java.lang.String, p1: int): void
+    public static method valueOf(p0: java.lang.String): E
+    public static method values(): E[]
+}
+
+@kotlin.Metadata
+public final class MemberExtensionPropertyAndImportFromObjectKt {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static @org.jetbrains.annotations.NotNull field result$delegate: Delegate
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getResult(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class O {
+    // source: 'memberExtensionPropertyAndImportFromObject.kt'
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: O
+    static method <clinit>(): void
+    private method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getD(@org.jetbrains.annotations.NotNull p0: E): Delegate
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/memberExtensionPropertyAndLocalDelegatedProperty.kt

@@ -0,0 +1,17 @@
+// CHECK_BYTECODE_LISTING
+
+enum class E { X }
+
+object O {
+    val E.d: Delegate get() = Delegate()
+}
+
+class Delegate {
+    operator fun getValue(thisRef: Any?, property: Any?) =
+        if (thisRef == null) "OK" else "Failed"
+}
+
+fun box(): String = with(O) {
+    val result by E.X.d
+    result
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/memberExtensionPropertyAndLocalDelegatedProperty.txt

@@ -0,0 +1,34 @@
+@kotlin.Metadata
+public final class Delegate {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object): java.lang.String
+}
+
+@kotlin.Metadata
+public final enum class E {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    private synthetic final static field $VALUES: E[]
+    public final enum static field X: E
+    static method <clinit>(): void
+    private method <init>(p0: java.lang.String, p1: int): void
+    public static method valueOf(p0: java.lang.String): E
+    public static method values(): E[]
+}
+
+@kotlin.Metadata
+public final class MemberExtensionPropertyAndLocalDelegatedPropertyKt {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class O {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: O
+    static method <clinit>(): void
+    private method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getD(@org.jetbrains.annotations.NotNull p0: E): Delegate
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/memberExtensionPropertyAndLocalDelegatedProperty_ir.txt

@@ -0,0 +1,36 @@
+@kotlin.Metadata
+public final class Delegate {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    public method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object): java.lang.String
+}
+
+@kotlin.Metadata
+public final enum class E {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    private synthetic final static field $VALUES: E[]
+    public final enum static field X: E
+    private synthetic final static method $values(): E[]
+    static method <clinit>(): void
+    private method <init>(p0: java.lang.String, p1: int): void
+    public static method valueOf(p0: java.lang.String): E
+    public static method values(): E[]
+}
+
+@kotlin.Metadata
+public final class MemberExtensionPropertyAndLocalDelegatedPropertyKt {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    static method <clinit>(): void
+    private final static method box$lambda-1$lambda-0(p0: Delegate): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class O {
+    // source: 'memberExtensionPropertyAndLocalDelegatedProperty.kt'
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: O
+    static method <clinit>(): void
+    private method <init>(): void
+    public final @org.jetbrains.annotations.NotNull method getD(@org.jetbrains.annotations.NotNull p0: E): Delegate
+}

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/multimodule.kt

@@ -0,0 +1,14 @@
+// TARGET_BACKEND: JVM
+// CHECK_BYTECODE_LISTING
+
+// MODULE: lib
+// FILE: file1.kt
+val impl = 123
+
+// MODULE: main(lib)
+// FILE: file2.kt
+operator fun Any?.getValue(thisRef: Any?, property: Any?) = "OK"
+
+val s: String by impl
+
+fun box() = s

compiler/testData/codegen/box/delegatedProperty/delegateToFinalProperty/multimodule.txt

@@ -0,0 +1,19 @@
+Module: lib
+@kotlin.Metadata
+public final class File1Kt {
+    // source: 'file1.kt'
+    private final static field impl: int
+    static method <clinit>(): void
+    public final static method getImpl(): int
+}
+Module: main
+@kotlin.Metadata
+public final class File2Kt {
+    // source: 'file2.kt'
+    synthetic final static field $$delegatedProperties: kotlin.reflect.KProperty[]
+    private final static field s$delegate: int
+    static method <clinit>(): void
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method getValue(@org.jetbrains.annotations.Nullable p0: java.lang.Object, @org.jetbrains.annotations.Nullable p1: java.lang.Object, @org.jetbrains.annotations.Nullable p2: java.lang.Object): java.lang.String
+}