diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt
index 34130d8655b..8b07910854e 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compiler.kt
@@ -45,6 +45,7 @@ fun compile(
     files: List<KtFile>,
     configuration: CompilerConfiguration,
     export: List<FqName> = emptyList(),
+    isKlibCompilation: Boolean = false,
     dependencies: List<CompiledModule> = emptyList(),
     builtInsModule: CompiledModule? = null,
     moduleType: ModuleType
@@ -82,24 +83,36 @@ fun compile(
         moduleType
     )
 
-    // TODO: Split compilation into two steps: kt -> ir, ir -> js
-    val moduleName = configuration[CommonConfigurationKeys.MODULE_NAME]!!
-    when (moduleType) {
-        ModuleType.MAIN -> {
-            val moduleDependencies: List<CompiledModule> =
-                DFS.topologicalOrder(dependencies, CompiledModule::dependencies)
-                    .filter { it.moduleType == ModuleType.SECONDARY }
 
-            val fileDependencies = moduleDependencies.flatMap { it.moduleFragment!!.files }
+    if (isKlibCompilation) {
+//        val declarationTable = DeclarationTable(moduleFragment.irBuiltins, DescriptorTable())
+//        val serializedIr = IrModuleSerializer(context, declarationTable/*, onlyForInlines = false*/).serializedIrModule(moduleFragment)
+//        val serializer = KonanSerializationUtil(context, configuration.get(CommonConfigurationKeys.METADATA_VERSION)!!, declarationTable)
+//        val serializedData = serializer.serializeModule(analysisResult.moduleDescriptor, serializedIr)
+//        buildLibrary(serializedData)
+//
+        TODO("Implemenet IrSerialization")
+    } else {
 
-            moduleFragment.files.addAll(0, fileDependencies)
-        }
+        // TODO: Split compilation into two steps: kt -> ir, ir -> js
+        val moduleName = configuration[CommonConfigurationKeys.MODULE_NAME]!!
+        when (moduleType) {
+            ModuleType.MAIN -> {
+                val moduleDependencies: List<CompiledModule> =
+                    DFS.topologicalOrder(dependencies, CompiledModule::dependencies)
+                        .filter { it.moduleType == ModuleType.SECONDARY }
 
-        ModuleType.SECONDARY -> {
-            return CompiledModule(moduleName, null, moduleFragment, moduleType, dependencies)
-        }
+                val fileDependencies = moduleDependencies.flatMap { it.moduleFragment!!.files }
 
-        ModuleType.TEST_RUNTIME -> {
+                moduleFragment.files.addAll(0, fileDependencies)
+            }
+
+            ModuleType.SECONDARY -> {
+                return CompiledModule(moduleName, null, moduleFragment, moduleType, dependencies)
+            }
+
+            ModuleType.TEST_RUNTIME -> {
+            }
         }
     }
 
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/FunctionInlining.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/FunctionInlining.kt
index 1571131e2bb..96fa2bf9dc3 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/FunctionInlining.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/FunctionInlining.kt
@@ -14,10 +14,7 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
-import org.jetbrains.kotlin.ir.builders.Scope
-import org.jetbrains.kotlin.ir.builders.irCall
-import org.jetbrains.kotlin.ir.builders.irGet
-import org.jetbrains.kotlin.ir.builders.irReturn
+import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
@@ -29,9 +26,7 @@ import org.jetbrains.kotlin.ir.types.toKotlinType
 import org.jetbrains.kotlin.ir.util.file
 import org.jetbrains.kotlin.ir.util.getArguments
 import org.jetbrains.kotlin.ir.util.parentAsClass
-import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
-import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
-import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
+import org.jetbrains.kotlin.ir.visitors.*
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
 import org.jetbrains.kotlin.resolve.inline.InlineUtil
@@ -134,8 +129,6 @@ internal class FunctionInlining(val context: Context): IrElementTransformerWithC
         return transformedModule
     }
 
-    //-------------------------------------------------------------------------//
-
     override fun visitFunctionNew(declaration: IrFunction, data: Ref<Boolean>): IrStatement {
         val descriptor = declaration.descriptor
 
@@ -160,15 +153,14 @@ internal class FunctionInlining(val context: Context): IrElementTransformerWithC
         if (callee == null) {                                                  // We failed to get the declaration.
             val message = "Inliner failed to obtain function declaration: " +
                     functionDescriptor.fqNameSafe.toString()
-            callee
             context.reportWarning(message, currentFile, callSite)                             // Report warning.
             return callSite
         }
         data.value = data.value or callee.second
 
         val childIsBad = Ref(inlineFunctions[functionDescriptor] ?: false)
-        callee.first.transformChildren(this, childIsBad)
-        inlineFunctions[functionDescriptor] = childIsBad.value// Process recursive inline.
+        callee.first.transformChildren(this, childIsBad)                            // Process recursive inline.
+        inlineFunctions[functionDescriptor] = childIsBad.value
         data.value = data.value or childIsBad.value
 
         val currentCalleeIsBad = argsAreBad.value or childIsBad.value or callee.second
@@ -194,7 +186,7 @@ internal class FunctionInlining(val context: Context): IrElementTransformerWithC
 }
 
 // TODO: should we keep this at all?
-private val inlineConstructor = FqName("konan.internal.InlineConstructor")
+private val inlineConstructor = FqName("kotlin.native.internal.InlineConstructor")
 private val FunctionDescriptor.isInlineConstructor get() = annotations.hasAnnotation(inlineConstructor)
 
 //-----------------------------------------------------------------------------//
@@ -328,7 +320,8 @@ private class Inliner(val globalSubstituteMap: MutableMap<DeclarationDescriptor,
             if (functionArgument == null)
                 return super.visitCall(expression)
             val dispatchDescriptor = dispatchReceiver.descriptor
-            if (dispatchDescriptor is ValueParameterDescriptor && dispatchDescriptor.isNoinline) return super.visitCall(expression)
+            if (dispatchDescriptor is ValueParameterDescriptor &&
+                    dispatchDescriptor.isNoinline) return super.visitCall(expression)
 
             if (functionArgument is IrFunctionReference) {
                 if (!functionArgument.isLambda) return super.visitCall(expression)
@@ -378,7 +371,7 @@ private class Inliner(val globalSubstituteMap: MutableMap<DeclarationDescriptor,
         override fun visitElement(element: IrElement) = element.accept(this, null)
     }
 
-    private fun isLambdaCall(irCall: IrCall) = irCall.descriptor.isFunctionInvoke && irCall.dispatchReceiver is IrGetValue
+    private fun isLambdaCall(irCall: IrCall)  = irCall.descriptor.isFunctionInvoke && irCall.dispatchReceiver is IrGetValue
 
     private fun createTypeSubstitutor(irCall: IrCall): TypeSubstitutor? {
         if (irCall.typeArgumentsCount == 0) return null
diff --git a/js/js.tests/build.gradle.kts b/js/js.tests/build.gradle.kts
index e198da7ce8f..0a2f709b7a7 100644
--- a/js/js.tests/build.gradle.kts
+++ b/js/js.tests/build.gradle.kts
@@ -15,6 +15,8 @@ node {
 val antLauncherJar by configurations.creating
 val testJsRuntime by configurations.creating
 
+val generateIrRuntimeKlib by generator("org.jetbrains.kotlin.generators.tests.GenerateIrRuntimeKt")
+
 dependencies {
     testRuntime(intellijDep())
 
@@ -53,6 +55,7 @@ sourceSets {
 projectTest {
     dependsOn(":dist")
     dependsOn(testJsRuntime)
+    dependsOn(generateIrRuntimeKlib)
     jvmArgs("-da:jdk.nashorn.internal.runtime.RecompilableScriptFunctionData") // Disable assertion which fails due to a bug in nashorn (KT-23637)
     workingDir = rootDir
     if (findProperty("kotlin.compiler.js.ir.tests.skip")?.toString()?.toBoolean() == true) {
@@ -66,7 +69,7 @@ projectTest {
     val prefixForPpropertiesToForward = "fd."
     for ((key, value) in properties) {
         if (key.startsWith(prefixForPpropertiesToForward)) {
-            systemProperty(key.substring(prefixForPpropertiesToForward.length), value)
+            systemProperty(key.substring(prefixForPpropertiesToForward.length), value!!)
         }
     }
 }
diff --git a/js/js.tests/test/org/jetbrains/kotlin/generators/tests/GenerateIrRuntime.kt b/js/js.tests/test/org/jetbrains/kotlin/generators/tests/GenerateIrRuntime.kt
new file mode 100644
index 00000000000..733a09de8de
--- /dev/null
+++ b/js/js.tests/test/org/jetbrains/kotlin/generators/tests/GenerateIrRuntime.kt
@@ -0,0 +1,65 @@
+/*
+ * 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/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.generators.tests
+
+import com.intellij.openapi.Disposable
+import com.intellij.openapi.vfs.StandardFileSystems
+import com.intellij.openapi.vfs.VirtualFileManager
+import com.intellij.psi.PsiManager
+import org.jetbrains.kotlin.cli.jvm.compiler.EnvironmentConfigFiles
+import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
+import org.jetbrains.kotlin.config.*
+import org.jetbrains.kotlin.ir.backend.js.compile
+import org.jetbrains.kotlin.js.test.runtimeSources
+import org.jetbrains.kotlin.psi.KtFile
+import java.io.File
+
+fun buildConfiguration(environment: KotlinCoreEnvironment): CompilerConfiguration {
+    val runtimeConfiguration = environment.configuration.copy()
+    runtimeConfiguration.put(CommonConfigurationKeys.MODULE_NAME, "JS_IR_RUNTIME")
+
+    runtimeConfiguration.languageVersionSettings = LanguageVersionSettingsImpl(
+        LanguageVersion.LATEST_STABLE, ApiVersion.LATEST_STABLE,
+        specificFeatures = mapOf(
+            LanguageFeature.AllowContractsForCustomFunctions to LanguageFeature.State.ENABLED,
+            LanguageFeature.MultiPlatformProjects to LanguageFeature.State.ENABLED
+        ),
+        analysisFlags = mapOf(
+            AnalysisFlags.useExperimental to listOf("kotlin.contracts.ExperimentalContracts", "kotlin.Experimental"),
+            AnalysisFlags.allowResultReturnType to true
+        )
+    )
+
+    return runtimeConfiguration
+}
+
+private val stdKlibFile = File("js/js.translator/testData/out/klibs/stdlib.klib")
+
+fun main() {
+
+    val environment = KotlinCoreEnvironment.createForTests(Disposable { }, CompilerConfiguration(), EnvironmentConfigFiles.JS_CONFIG_FILES)
+
+    fun createPsiFile(fileName: String): KtFile {
+        val psiManager = PsiManager.getInstance(environment.project)
+        val fileSystem = VirtualFileManager.getInstance().getFileSystem(StandardFileSystems.FILE_PROTOCOL)
+
+        val file = fileSystem.findFileByPath(fileName) ?: error("File not found: $fileName")
+
+        return psiManager.findFile(file) as KtFile
+    }
+
+    val result = compile(
+        environment.project,
+        runtimeSources.map(::createPsiFile),
+        buildConfiguration(environment),
+        null,
+        true,
+        emptyList(),
+        emptyList()
+    )
+
+    TODO("Write library into $stdKlibFile")
+}
\ No newline at end of file
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt b/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt
index 23a7af4fe6d..2675aa2e989 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt
@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.js.config.JsConfig
 import org.jetbrains.kotlin.js.facade.MainCallParameters
 import org.jetbrains.kotlin.js.facade.TranslationUnit
 import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.jetbrains.kotlin.test.TargetBackend
 import java.io.File
 
@@ -116,6 +117,7 @@ abstract class BasicIrBoxTest(
             filesToCompile,
             config.configuration,
             listOf(FqName((testPackage?.let { "$it." } ?: "") + testFunction)),
+            false,
             dependencies,
             runtimeResult,
             moduleType = if (isMainModule) ModuleType.MAIN else ModuleType.SECONDARY