K2: reproduce situation from KT-62863

compiler/testData/ir/irText/expressions/smartCastAside2.kt

@@ -0,0 +1,44 @@
+// ISSUE: KT-62863
+
+fun <K> materialize(): K = null!!
+
+interface Foo<out T> {
+    fun foo()
+}
+
+abstract class Bar<T : Any> {
+    abstract fun bar()
+}
+
+fun <T> Foo<T>.extFoo() {}
+fun <T : Any> Bar<T>.extBar() {}
+
+fun test_1(x: Any) {
+    x as Bar<Any>
+    x as Foo<Any>
+
+    x.foo()
+    x.bar()
+    x.extFoo<Any>()
+    x.extBar<Any>()
+}
+
+fun test_2(x: Any) {
+    x as Bar<Any>?
+    x as Foo<Any>?
+
+    x!!.foo()
+    x!!.bar()
+    x!!.extFoo<Any>()
+    x!!.extBar<Any>()
+}
+
+fun test_3(x: Any) {
+    x as Bar<Any>?
+    x as Foo<Any>?
+
+    (x ?: materialize()).foo()
+    (x ?: materialize()).bar()
+    (x ?: materialize()).extFoo<Any>()
+    (x ?: materialize()).extBar<Any>()
+}