[K/N][tests] Couple of reproducers for #KT-67218

kotlin-native/backend.native/tests/build.gradle

@@ -2814,6 +2814,20 @@ standaloneTest("devirtualization_anonymousObject") {
     source = "codegen/devirtualization/anonymousObject.kt"
 }
 
+standaloneTest("devirtualization_kt67281c") {
+    disabled = (cacheTesting != null) // Cache is not compatible with -opt.
+    useGoldenData = true
+    flags = ["-opt"]
+    source = "codegen/devirtualization/kt67218c.kt"
+}
+
+standaloneTest("devirtualization_kt67281i") {
+    disabled = (cacheTesting != null) // Cache is not compatible with -opt.
+    useGoldenData = true
+    flags = ["-opt"]
+    source = "codegen/devirtualization/kt67218i.kt"
+}
+
 tasks.register("interfaceCallsNCasts_conservativeItable", KonanLocalTest) {
     useGoldenData = true
     source = "codegen/interfaceCallsNCasts/conservativeItable.kt"

kotlin-native/backend.native/tests/codegen/devirtualization/kt67218c.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+open class A {
+    open fun foo() = 42
+}
+
+open class B : A() {
+    override fun foo() = 117
+}
+
+class C : A()
+
+class D : A()
+
+class E : B()
+
+class F : B()
+
+class G : B()
+
+fun foo(a: A) = a.foo()
+
+fun box(): String {
+    if (foo(E()) != 117) return "fail 1"
+    if (foo(F()) != 117) return "fail 2"
+    if (foo(G()) != 117) return "fail 3"
+    if (foo(C()) != 42) return "fail 4"
+    if (foo(D()) != 42) return "fail 5"
+
+    return "OK"
+}
+
+fun main() = println(box())

kotlin-native/backend.native/tests/codegen/devirtualization/kt67218c.out

@@ -0,0 +1 @@
+OK

kotlin-native/backend.native/tests/codegen/devirtualization/kt67218i.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+interface I {
+    fun foo() = 42
+}
+
+open class B : I {
+    override fun foo() = 117
+}
+
+class C : I
+
+class D : I
+
+class E : B()
+
+class F : B()
+
+class G : B()
+
+fun foo(i: I) = i.foo()
+
+fun box(): String {
+    if (foo(E()) != 117) return "fail 1"
+    if (foo(F()) != 117) return "fail 2"
+    if (foo(G()) != 117) return "fail 3"
+    if (foo(C()) != 42) return "fail 4"
+    if (foo(D()) != 42) return "fail 5"
+
+    return "OK"
+}
+
+fun main() = println(box())

kotlin-native/backend.native/tests/codegen/devirtualization/kt67218i.out

@@ -0,0 +1 @@
+OK