FIR: report SMARTCAST_IMPOSSIBLE on inherited alien properties [KT-48101]

compiler/testData/diagnostics/tests/smartCasts/publicVals/otherModuleInheritance.fir.kt

@@ -0,0 +1,25 @@
+// MODULE: m1
+// FILE: A.kt
+
+open class Base(val x: Any)
+open class Generic<T>(val y: T)
+
+// MODULE: m2(m1)
+// FILE: B.kt
+
+class Derived : Base("123") {
+    fun foo() {
+        if (x is String) {
+            <!SMARTCAST_IMPOSSIBLE!>x<!>.length // impossible since `x` is in another module. FE1.0 allows this due to KT-47225
+        }
+    }
+}
+
+class MyGeneric : Generic<Number>(42) {
+    private fun baz(arg: Int) {}
+    fun bar() {
+        if (y is Int) {
+            baz(<!SMARTCAST_IMPOSSIBLE!>y<!>) // impossible since `y` is in another module. FE1.0 allows this due to KT-47225
+        }
+    }
+}

compiler/testData/diagnostics/tests/smartCasts/publicVals/otherModuleInheritance.kt

@@ -0,0 +1,25 @@
+// MODULE: m1
+// FILE: A.kt
+
+open class Base(val x: Any)
+open class Generic<T>(val y: T)
+
+// MODULE: m2(m1)
+// FILE: B.kt
+
+class Derived : Base("123") {
+    fun foo() {
+        if (x is String) {
+            <!DEBUG_INFO_SMARTCAST!>x<!>.length // impossible since `x` is in another module. FE1.0 allows this due to KT-47225
+        }
+    }
+}
+
+class MyGeneric : Generic<Number>(42) {
+    private fun baz(arg: Int) {}
+    fun bar() {
+        if (y is Int) {
+            baz(<!DEBUG_INFO_SMARTCAST!>y<!>) // impossible since `y` is in another module. FE1.0 allows this due to KT-47225
+        }
+    }
+}

compiler/testData/diagnostics/tests/smartCasts/publicVals/otherModuleInheritance.txt

@@ -0,0 +1,40 @@
+// -- Module: <m1> --
+package
+
+public open class Base {
+    public constructor Base(/*0*/ x: kotlin.Any)
+    public final val x: kotlin.Any
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public open class Generic</*0*/ T> {
+    public constructor Generic</*0*/ T>(/*0*/ y: T)
+    public final val y: T
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+// -- Module: <m2> --
+package
+
+public final class Derived : Base {
+    public constructor Derived()
+    public final override /*1*/ /*fake_override*/ val x: kotlin.Any
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class MyGeneric : Generic<kotlin.Number> {
+    public constructor MyGeneric()
+    public final override /*1*/ /*fake_override*/ val y: kotlin.Number
+    public final fun bar(): kotlin.Unit
+    private final fun baz(/*0*/ arg: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}