JVM IR: generate facade class for property accessors from dependencies

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/Ir.kt

@@ -15,7 +15,6 @@ import org.jetbrains.kotlin.descriptors.findClassAcrossModuleDependencies
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
-import org.jetbrains.kotlin.ir.declarations.IrPackageFragment
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
@@ -240,7 +239,7 @@ abstract class Symbols<out T : CommonBackendContext>(val context: T, private val
         fun isLateinitIsInitializedPropertyGetter(symbol: IrFunctionSymbol): Boolean =
             symbol is IrSimpleFunctionSymbol && symbol.owner.let { function ->
                 function.name.asString() == "<get-isInitialized>" &&
-                        function.parent is IrPackageFragment &&
+                        function.isTopLevel &&
                         function.getPackageFragment()!!.fqName.asString() == "kotlin" &&
                         function.valueParameters.isEmpty() &&
                         symbol.owner.extensionReceiverParameter?.type?.classOrNull?.owner.let { receiverClass ->

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt

@@ -350,8 +350,11 @@ val IrFunction.isStatic: Boolean
     get() = parent is IrClass && dispatchReceiverParameter == null
 
 val IrDeclaration.isTopLevel: Boolean
-    get() = parent is IrPackageFragment
-
+    get() {
+        if (parent is IrPackageFragment) return true
+        val parentClass = parent as? IrClass
+        return parentClass?.origin == IrDeclarationOrigin.FILE_CLASS && parentClass.parent is IrPackageFragment
+    }
 
 fun Scope.createTemporaryVariableWithWrappedDescriptor(
     irExpression: IrExpression,

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeclarationStubGenerator.kt

@@ -67,8 +67,9 @@ class DeclarationStubGenerator(
     }
 
     fun generateOrGetFacadeClass(descriptor: DeclarationDescriptor): IrClass? {
-        val packageFragment = descriptor.containingDeclaration as? PackageFragmentDescriptor ?: return null
-        val containerSource = descriptor.safeAs<DescriptorWithContainerSource>()?.containerSource ?: return null
+        val directMember = descriptor.safeAs<PropertyAccessorDescriptor>()?.correspondingProperty ?: descriptor
+        val packageFragment = directMember.containingDeclaration as? PackageFragmentDescriptor ?: return null
+        val containerSource = directMember.safeAs<DescriptorWithContainerSource>()?.containerSource ?: return null
         return facadeClassMap.getOrPut(containerSource) {
             facadeClassGenerator(containerSource)?.also { facade ->
                 val packageStub = generateOrGetEmptyExternalPackageFragmentStub(packageFragment)