Fix missing "outer this" field in cached super inner classes

#KT-39153 Fixed

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt

@@ -254,7 +254,7 @@ internal class Context(config: KonanConfig) : KonanBackendContext(config) {
     val layoutBuilders = mutableMapOf<IrClass, ClassLayoutBuilder>()
 
     fun getLayoutBuilder(irClass: IrClass) = layoutBuilders.getOrPut(irClass) {
-        ClassLayoutBuilder(irClass, this)
+        ClassLayoutBuilder(irClass, this, isLowered = shouldLower(this, irClass))
     }
 
     lateinit var globalHierarchyAnalysisResult: GlobalHierarchyAnalysisResult

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ToplevelPhases.kt

@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.konan.DeserializedKlibModuleOrigin
 import org.jetbrains.kotlin.descriptors.konan.KlibModuleOrigin
 import org.jetbrains.kotlin.descriptors.konan.isNativeStdlib
+import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
@@ -256,7 +257,10 @@ internal val psiToIrPhase = konanUnitPhase(
             linker.modules.values.forEach{ fakeOverrideChecker.check(it) }
 
             irModule = module
+
+            // Note: coupled with [shouldLower] below.
             irModules = linker.modules.filterValues { llvmModuleSpecification.containsModule(it) }
+
             ir.symbols = symbols
 
             functionIrClassFactory.module =
@@ -268,6 +272,11 @@ internal val psiToIrPhase = konanUnitPhase(
         prerequisite = setOf(createSymbolTablePhase)
 )
 
+// Coupled with [psiToIrPhase] logic above.
+internal fun shouldLower(context: Context, declaration: IrDeclaration): Boolean {
+    return context.llvmModuleSpecification.containsDeclaration(declaration)
+}
+
 internal val destroySymbolTablePhase = konanUnitPhase(
         op = {
             this.symbolTable = null // TODO: invalidate symbolTable itself.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/descriptors/ClassLayoutBuilder.kt

@@ -12,6 +12,7 @@ import org.jetbrains.kotlin.backend.konan.ir.*
 import org.jetbrains.kotlin.backend.konan.llvm.functionName
 import org.jetbrains.kotlin.backend.konan.llvm.llvmType
 import org.jetbrains.kotlin.backend.konan.llvm.localHash
+import org.jetbrains.kotlin.backend.konan.lower.InnerClassLowering
 import org.jetbrains.kotlin.backend.konan.lower.bridgeTarget
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.IrElement
@@ -260,7 +261,7 @@ internal class GlobalHierarchyAnalysis(val context: Context, val irModule: IrMod
     }
 }
 
-internal class ClassLayoutBuilder(val irClass: IrClass, val context: Context) {
+internal class ClassLayoutBuilder(val irClass: IrClass, val context: Context, val isLowered: Boolean) {
     private val DEBUG = 0
 
     private inline fun DEBUG_OUTPUT(severity: Int, block: () -> Unit) {
@@ -432,7 +433,15 @@ internal class ClassLayoutBuilder(val irClass: IrClass, val context: Context) {
      * Fields declared in the class.
      */
     private fun getDeclaredFields(): List<IrField> {
-        val fields = irClass.declarations.mapNotNull {
+        val declarations: List<IrDeclaration> = if (irClass.isInner && !isLowered) {
+            // Note: copying to avoid mutation of the original class.
+            irClass.declarations.toMutableList()
+                    .also { InnerClassLowering.addOuterThisField(it, irClass, context) }
+        } else {
+            irClass.declarations
+        }
+
+        val fields = declarations.mapNotNull {
             when (it) {
                 is IrField -> it.takeIf { it.isReal }
                 is IrProperty -> it.takeIf { it.isReal }?.backingField

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InnerClassLowering.kt

@@ -9,9 +9,7 @@ import org.jetbrains.kotlin.backend.common.ClassLoweringPass
 import org.jetbrains.kotlin.backend.common.IrElementTransformerVoidWithContext
 import org.jetbrains.kotlin.backend.common.lower.callsSuper
 import org.jetbrains.kotlin.backend.konan.Context
-import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.declarations.IrConstructor
-import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.IrBlockBody
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrGetValue
@@ -20,7 +18,6 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrSetFieldImpl
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
-import org.jetbrains.kotlin.ir.types.IrSimpleType
 import org.jetbrains.kotlin.ir.types.classifierOrNull
 import org.jetbrains.kotlin.ir.util.dump
 import org.jetbrains.kotlin.ir.util.parentAsClass
@@ -32,6 +29,14 @@ internal class InnerClassLowering(val context: Context) : ClassLoweringPass {
         InnerClassTransformer(irClass).lowerInnerClass()
     }
 
+    companion object {
+        fun addOuterThisField(declarations: MutableList<IrDeclaration>, irClass: IrClass, context: Context): IrField {
+            val outerThisField = context.specialDeclarationsFactory.getOuterThisField(irClass)
+            declarations += outerThisField
+            return outerThisField
+        }
+    }
+
     private inner class InnerClassTransformer(val irClass: IrClass) {
         lateinit var outerThisFieldSymbol: IrFieldSymbol
 
@@ -44,8 +49,8 @@ internal class InnerClassLowering(val context: Context) : ClassLoweringPass {
         }
 
         private fun createOuterThisField() {
-            irClass.declarations += context.specialDeclarationsFactory.getOuterThisField(irClass)
+            val outerThisField = addOuterThisField(irClass.declarations, irClass, context)
-            outerThisFieldSymbol = context.specialDeclarationsFactory.getOuterThisField(irClass).symbol
+            outerThisFieldSymbol = outerThisField.symbol
         }
 
         private fun lowerConstructors() {