K/N counterparts for:

Construct fake overrides after IR deserialization
Signature based fake override validation

(cherry picked from commit c2b1b976d79d7bbe9e80b8f7f2f382420c2d3805)

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

@@ -3,6 +3,7 @@ package org.jetbrains.kotlin.backend.konan
 import org.jetbrains.kotlin.backend.common.*
 import org.jetbrains.kotlin.backend.common.extensions.IrPluginContextImpl
 import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
+import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideChecker
 import org.jetbrains.kotlin.backend.common.phaser.*
 import org.jetbrains.kotlin.backend.common.serialization.mangle.ManglerChecker
 import org.jetbrains.kotlin.backend.common.serialization.mangle.descriptor.Ir2DescriptorManglerAdapter
@@ -19,18 +20,17 @@ import org.jetbrains.kotlin.backend.konan.serialization.*
 import org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport
 import org.jetbrains.kotlin.config.CommonConfigurationKeys
 import org.jetbrains.kotlin.config.languageVersionSettings
-import org.jetbrains.kotlin.descriptors.*
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+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.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.acceptVoid
 import org.jetbrains.kotlin.konan.target.CompilerOutputKind
-import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi2ir.Psi2IrConfiguration
 import org.jetbrains.kotlin.psi2ir.Psi2IrTranslator
 import org.jetbrains.kotlin.utils.DFS
@@ -168,7 +168,8 @@ internal val psiToIrPhase = konanUnitPhase(
 
             val irProviderForCEnumsAndCStructs =
                     IrProviderForCEnumAndCStructStubs(generatorContext, interopBuiltIns, symbols)
-            val deserializer = KonanIrLinker(
+            val linker =
+                KonanIrLinker(
                     moduleDescriptor,
                     functionIrClassFactory,
                     this as LoggingContext,
@@ -188,7 +189,7 @@ internal val psiToIrPhase = konanUnitPhase(
                         generatorContext.symbolTable,
                         generatorContext.typeTranslator,
                         generatorContext.irBuiltIns,
-                        linker = deserializer
+                        linker = linker
                 )
                 pluginExtensions.forEach { extension ->
                     extension.generate(module, pluginContext)
@@ -212,7 +213,7 @@ internal val psiToIrPhase = konanUnitPhase(
                     val kotlinLibrary = dependency.getCapability(KlibModuleOrigin.CAPABILITY)?.let {
                         (it as? DeserializedKlibModuleOrigin)?.library
                     }
-                    deserializer.deserializeIrModuleHeader(dependency, kotlinLibrary)
+                    linker.deserializeIrModuleHeader(dependency, kotlinLibrary)
                 }
                 if (dependencies.size == dependenciesCount) break
                 dependenciesCount = dependencies.size
@@ -224,7 +225,7 @@ internal val psiToIrPhase = konanUnitPhase(
                     .filter(ModuleDescriptor::isFromInteropLibrary)
                     .forEach(irProviderForCEnumsAndCStructs::referenceAllEnumsAndStructsFrom)
 
-            val irProviders = listOf(deserializer)
+            val irProviders = listOf(linker)
             stubGenerator.setIrProviders(irProviders)
 
             expectDescriptorToSymbol = mutableMapOf<DeclarationDescriptor, IrSymbol>()
@@ -239,7 +240,7 @@ internal val psiToIrPhase = konanUnitPhase(
                 if (expectActualLinker) expectDescriptorToSymbol else null
             )
 
-            deserializer.postProcess()
+            linker.postProcess()
 
             if (this.stdlibModule in modulesWithoutDCE) {
                 functionIrClassFactory.buildAllClasses()
@@ -249,13 +250,15 @@ internal val psiToIrPhase = konanUnitPhase(
             stubGenerator.unboundSymbolGeneration = true
 
             module.acceptVoid(ManglerChecker(KonanManglerIr, Ir2DescriptorManglerAdapter(KonanManglerDesc)))
+            val fakeOverrideChecker = FakeOverrideChecker(KonanManglerIr, KonanManglerDesc)
+            linker.modules.values.forEach{ fakeOverrideChecker.check(it) }
 
             irModule = module
-            irModules = deserializer.modules.filterValues { llvmModuleSpecification.containsModule(it) }
+            irModules = linker.modules.filterValues { llvmModuleSpecification.containsModule(it) }
             ir.symbols = symbols
 
             functionIrClassFactory.module =
-                    (listOf(irModule!!) + deserializer.modules.values)
+                    (listOf(irModule!!) + linker.modules.values)
                             .single { it.descriptor.isNativeStdlib() }
         },
         name = "Psi2Ir",

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

@@ -1,31 +0,0 @@
-/*
- * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
-package org.jetbrains.kotlin.backend.konan.ir.interop
-
-import org.jetbrains.kotlin.ir.declarations.IrDeclaration
-import org.jetbrains.kotlin.ir.symbols.IrSymbol
-import org.jetbrains.kotlin.ir.util.DeclarationStubGenerator
-import org.jetbrains.kotlin.ir.util.IdSignature
-import org.jetbrains.kotlin.ir.util.IrProvider
-
-/**
- * Generates external IR declarations for descriptors from interop libraries.
- * [isSpecialInteropCase] allows to delegate providing of interop symbols to other providers.
- * For example, for CEnums we need to generate non-lazy IR.
- */
-class IrProviderForInteropStubs(
-        private val declarationStubGenerator: DeclarationStubGenerator,
-        private val isSpecialInteropCase: (IrSymbol) -> Boolean
-) : IrProvider {
-    override fun getDeclaration(symbol: IrSymbol): IrDeclaration? =
-            when {
-                symbol.isBound -> symbol.owner as IrDeclaration
-                isSpecialInteropCase(symbol) -> null
-                symbol.isPublicApi && symbol.signature.run { IdSignature.Flags.IS_NATIVE_INTEROP_LIBRARY.test() } ->
-                    declarationStubGenerator.generateMemberStub(symbol.descriptor)
-                else -> null
-            }
-
-}

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

@@ -15,9 +15,11 @@ import org.jetbrains.kotlin.descriptors.konan.CompiledKlibModuleOrigin
 import org.jetbrains.kotlin.descriptors.konan.CurrentKlibModuleOrigin
 import org.jetbrains.kotlin.descriptors.konan.DeserializedKlibModuleOrigin
 import org.jetbrains.kotlin.ir.declarations.*
+import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
 import org.jetbrains.kotlin.ir.util.file
 import org.jetbrains.kotlin.ir.util.fqNameForIrSerialization
 import org.jetbrains.kotlin.ir.util.isReal
+import org.jetbrains.kotlin.ir.util.render
 import org.jetbrains.kotlin.konan.library.KonanLibrary
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.library.KotlinLibrary
@@ -164,7 +166,6 @@ internal interface ContextUtils : RuntimeAware {
     val IrFunction.llvmFunctionOrNull: LLVMValueRef?
         get() {
             assert(this.isReal)
-
             return if (isExternal(this)) {
                 runtime.addedLLVMExternalFunctions.getOrPut(this) { context.llvm.externalFunction(this.symbolName, getLlvmFunctionType(this),
                         origin = this.llvmSymbolOrigin) }

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

@@ -527,7 +527,9 @@ internal object DataFlowIR {
             type.superTypes += irClass.superTypes.map { mapClassReferenceType(it.getClass()!!) }
             if (!isAbstract) {
                 val layoutBuilder = context.getLayoutBuilder(irClass)
-                type.vtable += layoutBuilder.vtableEntries.map { mapFunction(it.getImplementation(context)!!) }
+                type.vtable += layoutBuilder.vtableEntries.map {
+                    mapFunction(it.getImplementation(context)!!)
+                }
                 layoutBuilder.methodTableEntries.forEach {
                     type.itable[it.overriddenFunction.functionName.localHash.value] = mapFunction(it.getImplementation(context)!!)
                 }

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

@@ -23,4 +23,6 @@ class KonanIrFileSerializer(
 
     override fun backendSpecificExplicitRoot(declaration: IrClass) =
             declaration.annotations.hasAnnotation(RuntimeNames.exportTypeInfoAnnotation)
+
+    override fun backendSpecificSerializeAllMembers(irClass: IrClass) = !KonanFakeOverrideClassFilter.constructFakeOverrides(irClass)
 }

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

@@ -17,11 +17,15 @@
 package org.jetbrains.kotlin.backend.konan.serialization
 
 import org.jetbrains.kotlin.backend.common.LoggingContext
+import org.jetbrains.kotlin.backend.common.overrides.FakeOverrideBuilderImpl
+import org.jetbrains.kotlin.backend.common.overrides.PlatformFakeOverrideClassFilter
 import org.jetbrains.kotlin.backend.common.serialization.*
 import org.jetbrains.kotlin.backend.common.serialization.encodings.BinarySymbolData
+import org.jetbrains.kotlin.backend.common.serialization.signature.IdSignatureSerializer
 import org.jetbrains.kotlin.backend.konan.descriptors.isInteropLibrary
 import org.jetbrains.kotlin.backend.konan.descriptors.konanLibrary
 import org.jetbrains.kotlin.backend.konan.ir.interop.IrProviderForCEnumAndCStructStubs
+import org.jetbrains.kotlin.backend.konan.isObjCClass
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.konan.isNativeStdlib
 import org.jetbrains.kotlin.descriptors.konan.kotlinLibrary
@@ -41,6 +45,10 @@ import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.descriptorUtil.module
 
+object KonanFakeOverrideClassFilter : PlatformFakeOverrideClassFilter {
+    override fun constructFakeOverrides(clazz: IrClass): Boolean = !clazz.isObjCClass()
+}
+
 internal class KonanIrLinker(
         private val currentModule: ModuleDescriptor,
         override val functionalInteraceFactory: IrAbstractFunctionFactory,
@@ -64,6 +72,8 @@ internal class KonanIrLinker(
 
     override fun isBuiltInModule(moduleDescriptor: ModuleDescriptor): Boolean = moduleDescriptor.isNativeStdlib()
 
+    override val fakeOverrideBuilderImpl = FakeOverrideBuilderImpl(symbolTable, IdSignatureSerializer(KonanManglerIr), builtIns, KonanFakeOverrideClassFilter)
+
     private val forwardDeclarationDeserializer = forwardModuleDescriptor?.let { KonanForwardDeclarationModuleDeserialier(it) }
 
     override fun createModuleDeserializer(moduleDescriptor: ModuleDescriptor, klib: IrLibrary?, strategy: DeserializationStrategy): IrModuleDeserializer {