[FIR2IR] differentiate external Java stub origin from external stub

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt

@@ -39,6 +39,7 @@ import org.jetbrains.kotlin.ir.symbols.impl.IrClassSymbolImpl
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.types.impl.IrErrorTypeImpl
 import org.jetbrains.kotlin.ir.util.SymbolTable
+import org.jetbrains.kotlin.ir.util.functions
 import org.jetbrains.kotlin.ir.util.isFakeOverride
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.psiUtil.endOffset
@@ -453,3 +454,8 @@ internal fun IrDeclarationParent.declareThisReceiverParameter(
     }
 }
 
+fun FirClass<*>.irOrigin(firProvider: FirProvider): IrDeclarationOrigin = when {
+    firProvider.getFirClassifierContainerFileIfAny(symbol) != null -> IrDeclarationOrigin.DEFINED
+    origin == FirDeclarationOrigin.Java -> IrDeclarationOrigin.IR_EXTERNAL_JAVA_DECLARATION_STUB
+    else -> IrDeclarationOrigin.IR_EXTERNAL_DECLARATION_STUB
+}

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrClassifierStorage.kt

@@ -142,9 +142,7 @@ class Fir2IrClassifierStorage(
             return createIrAnonymousObject(klass, irParent = parent)
         }
         val regularClass = klass as FirRegularClass
-        val origin =
-            if (firProvider.getFirClassifierContainerFileIfAny(klass.symbol) != null) IrDeclarationOrigin.DEFINED
-            else IrDeclarationOrigin.IR_EXTERNAL_DECLARATION_STUB
+        val origin = regularClass.irOrigin(firProvider)
         val irClass = registerIrClass(regularClass, parent, origin)
         processClassHeader(regularClass, irClass)
         return irClass

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConverter.kt

@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi2ir.PsiSourceManager
+import org.jetbrains.kotlin.psi2ir.generators.GeneratorExtensions
 
 class Fir2IrConverter(
     private val moduleDescriptor: FirModuleDescriptor,
@@ -161,7 +162,8 @@ class Fir2IrConverter(
             firFiles: List<FirFile>,
             languageVersionSettings: LanguageVersionSettings,
             fakeOverrideMode: FakeOverrideMode = FakeOverrideMode.NORMAL,
-            signaturer: IdSignatureComposer
+            signaturer: IdSignatureComposer,
+            generatorExtensions: GeneratorExtensions = GeneratorExtensions()
         ): Fir2IrResult {
             val moduleDescriptor = FirModuleDescriptor(session)
             val symbolTable = SymbolTable(signaturer)
@@ -186,7 +188,9 @@ class Fir2IrConverter(
             }
             val irModuleFragment = IrModuleFragmentImpl(moduleDescriptor, builtIns, irFiles)
             val externalDependenciesGenerator = ExternalDependenciesGenerator(
-                symbolTable, generateTypicalIrProviderList(irModuleFragment.descriptor, builtIns, symbolTable), languageVersionSettings
+                symbolTable,
+                generateTypicalIrProviderList(irModuleFragment.descriptor, builtIns, symbolTable, extensions = generatorExtensions),
+                languageVersionSettings
             )
             // Necessary call to generate built-in IR classes
             externalDependenciesGenerator.generateUnboundSymbolsAsDependencies()

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrDeclarationStorage.kt

@@ -922,7 +922,8 @@ class Fir2IrDeclarationStorage(
                 val irEnumEntry = classifierStorage.createIrEnumEntry(
                     firDeclaration,
                     irParent = irParentClass,
-                    origin = if (containingFile == null) IrDeclarationOrigin.IR_EXTERNAL_DECLARATION_STUB else IrDeclarationOrigin.DEFINED
+                    origin = if (containingFile != null) IrDeclarationOrigin.DEFINED else
+                        (parentClassSymbol?.fir as? FirClass<*>)?.irOrigin(firProvider) ?: IrDeclarationOrigin.IR_EXTERNAL_DECLARATION_STUB
                 )
                 symbolTable.referenceEnumEntry(irEnumEntry.descriptor)
             }

compiler/fir/fir2ir/tests/org/jetbrains/kotlin/fir/AbstractFir2IrTextTest.kt

@@ -11,6 +11,7 @@ import com.intellij.psi.PsiElementFinder
 import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.asJava.finder.JavaElementFinder
 import org.jetbrains.kotlin.backend.common.serialization.signature.IdSignatureDescriptor
+import org.jetbrains.kotlin.backend.jvm.JvmGeneratorExtensions
 import org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM
 import org.jetbrains.kotlin.config.languageVersionSettings
 import org.jetbrains.kotlin.fir.backend.Fir2IrConverter
@@ -85,7 +86,9 @@ abstract class AbstractFir2IrTextTest : AbstractIrTextTestCase() {
         return Fir2IrConverter.createModuleFragment(
             session, resolveTransformer.scopeSession, firFiles,
             myEnvironment.configuration.languageVersionSettings,
-            signaturer = signaturer
+            signaturer = signaturer,
+            // TODO: differentiate JVM resolve from other targets, such as JS resolve.
+            generatorExtensions = JvmGeneratorExtensions(generateFacades = false)
         ).irModuleFragment
     }
 }