JVM_IR: generate facade classes for imported toplevel declarations

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/Psi2IrTranslator.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.psi2ir
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.util.IrDeserializer
 import org.jetbrains.kotlin.ir.util.SymbolTable
@@ -31,11 +32,13 @@ import org.jetbrains.kotlin.psi2ir.generators.GeneratorExtensions
 import org.jetbrains.kotlin.psi2ir.generators.ModuleGenerator
 import org.jetbrains.kotlin.psi2ir.transformations.insertImplicitCasts
 import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 import org.jetbrains.kotlin.utils.SmartList
 
 class Psi2IrTranslator(
     val languageVersionSettings: LanguageVersionSettings,
-    val configuration: Psi2IrConfiguration = Psi2IrConfiguration()
+    val configuration: Psi2IrConfiguration = Psi2IrConfiguration(),
+    val facadeClassGenerator: (DeserializedContainerSource) -> IrClass? = { null }
 ) {
     interface PostprocessingStep {
         fun postprocess(context: GeneratorContext, irElement: IrElement)
@@ -78,7 +81,7 @@ class Psi2IrTranslator(
         irModule.patchDeclarationParents()
 
         postprocess(context, irModule)
-        moduleGenerator.generateUnboundSymbolsAsDependencies(irModule, deserializer)
+        moduleGenerator.generateUnboundSymbolsAsDependencies(irModule, deserializer, facadeClassGenerator)
         return irModule
     }
 

compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/ModuleGenerator.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.psi2ir.generators
 
 import org.jetbrains.kotlin.backend.common.CodegenUtil
+import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.declarations.MetadataSource
@@ -27,6 +28,7 @@ import org.jetbrains.kotlin.ir.util.IrDeserializer
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.lazy.descriptors.findPackageFragmentForFile
+import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 import org.jetbrains.kotlin.utils.addIfNotNull
 
 class ModuleGenerator(override val context: GeneratorContext) : Generator {
@@ -43,9 +45,18 @@ class ModuleGenerator(override val context: GeneratorContext) : Generator {
             irModule.files.addAll(generateFiles(ktFiles))
         }
 
-    fun generateUnboundSymbolsAsDependencies(irModule: IrModuleFragment, deserializer: IrDeserializer? = null) {
+    fun generateUnboundSymbolsAsDependencies(
+        irModule: IrModuleFragment,
+        deserializer: IrDeserializer? = null,
+        facadeClassGenerator: (DeserializedContainerSource) -> IrClass? = { null }
+    ) {
         ExternalDependenciesGenerator(
-            irModule.descriptor, context.symbolTable, context.irBuiltIns, context.extensions.externalDeclarationOrigin, deserializer
+            irModule.descriptor,
+            context.symbolTable,
+            context.irBuiltIns,
+            context.extensions.externalDeclarationOrigin,
+            deserializer,
+            facadeClassGenerator
         ).generateUnboundSymbolsAsDependencies()
     }