[Platform API] Introduce fundamental abstraction of Platform

This is a large commit, which introduces general API for working with
abstraction of Platform.

- Add new abstraction to 'core' - SimplePlatform - which represents
exactly one platform
  - Clients are strongly prohibited to create instances of SimplePlatform
  by hand, instead, corresponding *Platforms abstraction should be used
  (e.g. JvmPlatforms, JsPlatforms, KonanPlatforms)

- Move TargetPlatform to 'core', it represents now a collection of
SimplePlatforms
  - Clients are strongly encouraged to use TargetPlatform
    (not SimplePlatform) in API, to enforce checks for multiplatform

- Provide a helper-extensions to work with TargetPlatform
(in particular, for getting a specific component platform)

- Remove MultiTargetPlatform in favour of TargetPlatform
  - Notably, this commit leaves another widely used duplicated abstraction,
    namely, IdePlatform. For the sake sanity, removal of IdePlatform is
    extracted in the separate commit.

.idea/copyright/apache.xml

@@ -0,0 +1,7 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="allowReplaceRegexp" value="JetBrains" />
+    <option name="notice" value="Copyright 2010-&amp;#36;today.year JetBrains s.r.o. and Kotlin Programming Language contributors.&#10;Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file." />
+    <option name="myName" value="apache" />
+  </copyright>
+</component>

compiler/cli/cli-common/build.gradle.kts

@@ -8,6 +8,7 @@ dependencies {
     compile(project(":core:util.runtime"))
     compile(project(":compiler:frontend"))
     compile(project(":compiler:frontend.java"))
+    compile(project(":js:js.frontend"))
     compileOnly(project(":kotlin-reflect-api"))
     compileOnly(intellijCoreDep()) { includeJars("intellij-core") }
     compileOnly(intellijDep()) { includeIntellijCoreJarDependencies(project) }

compiler/cli/cli-common/src/org/jetbrains/kotlin/analyzer/common/CommonResolverForModuleFactory.kt

@@ -22,7 +22,7 @@ import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.analyzer.*
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.config.LanguageVersionSettings
-import org.jetbrains.kotlin.config.TargetPlatformVersion
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.container.StorageComponentContainer
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.container.useImpl
@@ -38,6 +38,7 @@ import org.jetbrains.kotlin.incremental.components.ExpectActualTracker
 import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.load.kotlin.MetadataFinderFactory
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.lazy.ResolveSession
@@ -72,7 +73,7 @@ object CommonResolverForModuleFactory : ResolverForModuleFactory() {
 
     fun analyzeFiles(
         files: Collection<KtFile>, moduleName: Name, dependOnBuiltIns: Boolean, languageVersionSettings: LanguageVersionSettings,
-        capabilities: Map<ModuleDescriptor.Capability<*>, Any?> = mapOf(MultiTargetPlatform.CAPABILITY to MultiTargetPlatform.Common),
+        capabilities: Map<ModuleDescriptor.Capability<*>, Any?> = emptyMap(),
         metadataPartProviderFactory: (ModuleContent<ModuleInfo>) -> MetadataPartProvider
     ): AnalysisResult {
         val moduleInfo = SourceModuleInfo(moduleName, capabilities, dependOnBuiltIns)
@@ -121,8 +122,7 @@ object CommonResolverForModuleFactory : ResolverForModuleFactory() {
         platformParameters: PlatformAnalysisParameters,
         targetEnvironment: TargetEnvironment,
         resolverForProject: ResolverForProject<M>,
-        languageVersionSettings: LanguageVersionSettings,
-        targetPlatformVersion: TargetPlatformVersion
+        languageVersionSettings: LanguageVersionSettings
     ): ResolverForModule {
         val (moduleInfo, syntheticFiles, moduleContentScope) = moduleContent
         val project = moduleContext.project
@@ -156,7 +156,7 @@ object CommonResolverForModuleFactory : ResolverForModuleFactory() {
         metadataPartProvider: MetadataPartProvider,
         languageVersionSettings: LanguageVersionSettings
     ): StorageComponentContainer = createContainer("ResolveCommonCode", CommonPlatformCompilerServices) {
-        configureModule(moduleContext, CommonPlatform, TargetPlatformVersion.NoVersion, CommonPlatformCompilerServices, bindingTrace)
+        configureModule(moduleContext, DefaultBuiltInPlatforms.commonPlatform, CommonPlatformCompilerServices, bindingTrace)
 
         useInstance(moduleContentScope)
         useInstance(LookupTracker.DO_NOTHING)

compiler/cli/cli-common/src/org/jetbrains/kotlin/platform/CommonPlatforms.kt

@@ -0,0 +1,35 @@
+/*
+ * 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.platform
+
+import org.jetbrains.kotlin.platform.js.JsPlatforms
+import org.jetbrains.kotlin.platform.js.JsPlatforms.defaultJsPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms.defaultJvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms.jvm18
+import org.jetbrains.kotlin.platform.konan.KonanPlatforms
+import org.jetbrains.kotlin.platform.konan.KonanPlatforms.defaultKonanPlatform
+
+object CommonPlatforms {
+
+    val defaultCommonPlatform: TargetPlatform = TargetPlatform(
+        setOf(
+            defaultJvmPlatform.single(),
+            defaultJsPlatform.single(),
+            defaultKonanPlatform.single()
+        )
+    )
+
+    val allSimplePlatforms: List<TargetPlatform>
+        get() = sequence {
+            yieldAll(JvmPlatforms.allJvmPlatforms)
+            yieldAll(KonanPlatforms.allKonanPlatforms)
+            yieldAll(JsPlatforms.allJsPlatforms)
+
+            // TODO(dsavvinov): extensions points?
+        }.toList()
+}
+

compiler/cli/cli-common/src/org/jetbrains/kotlin/platform/konan/KonanPlatform.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.platform.konan
+
+import org.jetbrains.kotlin.platform.SimplePlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.toTargetPlatform
+
+abstract class KonanPlatform : SimplePlatform("Native") {
+    override val oldFashionedDescription: String
+        get() = "Kotlin/Native "
+}
+
+object KonanPlatforms {
+    val defaultKonanPlatform: TargetPlatform = object : KonanPlatform() {}.toTargetPlatform()
+
+    val allKonanPlatforms: List<TargetPlatform> = listOf(defaultKonanPlatform)
+}
+
+fun TargetPlatform?.isNative(): Boolean = this?.singleOrNull() is KonanPlatform

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt

@@ -66,11 +66,13 @@ import org.jetbrains.kotlin.modules.Module
 import org.jetbrains.kotlin.modules.TargetId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.progress.ProgressIndicatorAndCompilationCanceledStatus
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.resolve.PlatformDependentAnalyzerServices
 import org.jetbrains.kotlin.resolve.jvm.KotlinJavaPsiFacade
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformAnalyzerServices
 import org.jetbrains.kotlin.utils.newLinkedHashMapWithExpectedSize
 import org.jetbrains.kotlin.utils.tryConstructClassFromStringArgs
 import java.io.File
@@ -301,7 +303,11 @@ object KotlinToJVMBytecodeCompiler {
 
                 val dependencies: MutableList<ModuleInfo> = mutableListOf()
 
-                override val platform: TargetPlatform? get() = JvmPlatform
+                override val platform: TargetPlatform
+                    get() = JvmPlatforms.unspecifiedJvmPlatform
+
+                override val analyzerServices: PlatformDependentAnalyzerServices
+                    get() = JvmPlatformAnalyzerServices
 
                 override fun dependencies(): List<ModuleInfo> {
                     return dependencies

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/TopDownAnalyzerFacadeForJVM.kt

@@ -55,6 +55,7 @@ import org.jetbrains.kotlin.load.kotlin.incremental.IncrementalPackageFragmentPr
 import org.jetbrains.kotlin.load.kotlin.incremental.IncrementalPackagePartProvider
 import org.jetbrains.kotlin.modules.TargetId
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.jvm.JavaDescriptorResolver
@@ -167,8 +168,9 @@ object TopDownAnalyzerFacadeForJVM {
             val dependencyScope = GlobalSearchScope.notScope(sourceScope)
 
             val dependenciesContainer = createContainerForTopDownAnalyzerForJvm(
+                JvmPlatforms.jvmPlatformByTargetVersion(jvmTarget), // TODO(dsavvinov): do not pass JvmTarget around
                 dependenciesContext, trace, DeclarationProviderFactory.EMPTY, dependencyScope, lookupTracker, expectActualTracker,
-                packagePartProvider(dependencyScope), moduleClassResolver, targetEnvironment, jvmTarget, languageVersionSettings,
+                packagePartProvider(dependencyScope), moduleClassResolver, targetEnvironment, languageVersionSettings,
                 configureJavaClassFinder
             )
 
@@ -196,8 +198,9 @@ object TopDownAnalyzerFacadeForJVM {
         // to be stored in CliLightClassGenerationSupport, and it better be the source one (otherwise light classes would not be found)
         // TODO: get rid of duplicate invocation of CodeAnalyzerInitializer#initialize, or refactor CliLightClassGenerationSupport
         val container = createContainerForTopDownAnalyzerForJvm(
+            JvmPlatforms.jvmPlatformByTargetVersion(jvmTarget),
             moduleContext, trace, declarationProviderFactory(storageManager, files), sourceScope, lookupTracker, expectActualTracker,
-            partProvider, moduleClassResolver, targetEnvironment, jvmTarget, languageVersionSettings, configureJavaClassFinder,
+            partProvider, moduleClassResolver, targetEnvironment, languageVersionSettings, configureJavaClassFinder,
             configuration[JVMConfigurationKeys.JAVA_CLASSES_TRACKER]
         ).apply {
             initJvmBuiltInsForTopDownAnalysis()

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/descriptors/FirModuleDescriptor.kt

@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.fir.FirSession
 import org.jetbrains.kotlin.fir.resolve.FirSymbolProvider
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.TargetPlatform
 
 class FirModuleDescriptor(val session: FirSession) : ModuleDescriptor {
     override val builtIns: KotlinBuiltIns
@@ -25,6 +26,9 @@ class FirModuleDescriptor(val session: FirSession) : ModuleDescriptor {
         return false
     }
 
+    override val platform: TargetPlatform?
+        get() = null
+
     override fun getPackage(fqName: FqName): PackageViewDescriptor {
         val symbolProvider = FirSymbolProvider.getInstance(session)
         if (symbolProvider.getPackage(fqName) != null) {

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/AbstractFirDiagnosticsSmokeTest.kt

@@ -22,10 +22,12 @@ import org.jetbrains.kotlin.fir.resolve.FirProvider
 import org.jetbrains.kotlin.fir.resolve.impl.FirProviderImpl
 import org.jetbrains.kotlin.fir.resolve.transformers.FirTotalResolveTransformer
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
+import org.jetbrains.kotlin.platform.CommonPlatforms
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.js.JsPlatforms
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.konan.KonanPlatforms
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 import java.io.File
 import java.util.*
@@ -130,21 +132,23 @@ abstract class AbstractFirDiagnosticsSmokeTest : BaseDiagnosticsTest() {
     private val builtInsModuleInfo = BuiltInModuleInfo(Name.special("<built-ins>"))
 
     protected open fun createModule(moduleName: String): TestModuleInfo {
-        val nameSuffix = moduleName.substringAfterLast("-", "")
-        // TODO: use platform
+        val nameSuffix = moduleName.substringAfterLast("-", "").toUpperCase()
         @Suppress("UNUSED_VARIABLE")
         val platform =
             when {
-                nameSuffix.isEmpty() -> null
-                nameSuffix == "common" -> MultiTargetPlatform.Common
-                else -> MultiTargetPlatform.Specific(nameSuffix.toUpperCase())
+                nameSuffix.isEmpty() -> null // TODO(dsavvinov): this leads to 'null'-platform in ModuleDescriptor
+                nameSuffix == "COMMON" -> CommonPlatforms.defaultCommonPlatform
+                nameSuffix == "JVM" -> JvmPlatforms.defaultJvmPlatform // TODO(dsavvinov): determine JvmTarget precisely
+                nameSuffix == "JS" -> JsPlatforms.defaultJsPlatform
+                nameSuffix == "NATIVE" -> KonanPlatforms.defaultKonanPlatform
+                else -> throw IllegalStateException("Can't determine platform by name $nameSuffix")
             }
         return TestModuleInfo(Name.special("<$moduleName>"))
     }
 
     class BuiltInModuleInfo(override val name: Name) : ModuleInfo {
         override val platform: TargetPlatform?
-            get() = JvmPlatform
+            get() = JvmPlatforms.defaultJvmPlatform
 
         override val compilerServices: PlatformDependentCompilerServices
             get() = JvmPlatformCompilerServices
@@ -156,7 +160,7 @@ abstract class AbstractFirDiagnosticsSmokeTest : BaseDiagnosticsTest() {
 
     protected class TestModuleInfo(override val name: Name) : ModuleInfo {
         override val platform: TargetPlatform?
-            get() = JvmPlatform
+            get() = JvmPlatforms.defaultJvmPlatform
 
         override val compilerServices: PlatformDependentCompilerServices
             get() = JvmPlatformCompilerServices

compiler/frontend.common/src/org/jetbrains/kotlin/analyzer/ModuleInfo.kt

@@ -8,7 +8,7 @@ package org.jetbrains.kotlin.analyzer
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 
 
 interface ModuleInfo {

compiler/frontend.common/src/org/jetbrains/kotlin/resolve/TargetPlatform.kt

@@ -1,11 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * 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.resolve
-
-abstract class TargetPlatform(val platformName: String) {
-    override fun toString() = platformName
-    abstract val platform: MultiTargetPlatform
-}

compiler/frontend.java/src/org/jetbrains/kotlin/config/JvmTarget.kt

@@ -17,6 +17,7 @@
 
 package org.jetbrains.kotlin.config
 
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.org.objectweb.asm.Opcodes
 
 enum class JvmTarget(override val description: String) : TargetPlatformVersion {

compiler/frontend.java/src/org/jetbrains/kotlin/frontend/java/di/injection.kt

@@ -21,7 +21,6 @@ import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.builtins.jvm.JvmBuiltIns
 import org.jetbrains.kotlin.builtins.jvm.JvmBuiltInsPackageFragmentProvider
 import org.jetbrains.kotlin.config.JvmAnalysisFlags
-import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.container.*
@@ -41,9 +40,9 @@ import org.jetbrains.kotlin.load.java.lazy.ModuleClassResolver
 import org.jetbrains.kotlin.load.kotlin.DeserializationComponentsForJava
 import org.jetbrains.kotlin.load.kotlin.PackagePartProvider
 import org.jetbrains.kotlin.load.kotlin.VirtualFileFinderFactory
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.jvm.JavaDescriptorResolver
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 import org.jetbrains.kotlin.resolve.lazy.KotlinCodeAnalyzer
 import org.jetbrains.kotlin.resolve.lazy.ResolveSession
@@ -79,22 +78,22 @@ private fun StorageComponentContainer.configureJavaTopDownAnalysis(
 }
 
 fun createContainerForLazyResolveWithJava(
-        moduleContext: ModuleContext,
-        bindingTrace: BindingTrace,
-        declarationProviderFactory: DeclarationProviderFactory,
-        moduleContentScope: GlobalSearchScope,
-        moduleClassResolver: ModuleClassResolver,
-        targetEnvironment: TargetEnvironment,
-        lookupTracker: LookupTracker,
-        expectActualTracker: ExpectActualTracker,
-        packagePartProvider: PackagePartProvider,
-        jvmTarget: JvmTarget,
-        languageVersionSettings: LanguageVersionSettings,
-        useBuiltInsProvider: Boolean,
-        configureJavaClassFinder: (StorageComponentContainer.() -> Unit)? = null,
-        javaClassTracker: JavaClassesTracker? = null
+    jvmPlatform: TargetPlatform,
+    moduleContext: ModuleContext,
+    bindingTrace: BindingTrace,
+    declarationProviderFactory: DeclarationProviderFactory,
+    moduleContentScope: GlobalSearchScope,
+    moduleClassResolver: ModuleClassResolver,
+    targetEnvironment: TargetEnvironment,
+    lookupTracker: LookupTracker,
+    expectActualTracker: ExpectActualTracker,
+    packagePartProvider: PackagePartProvider,
+    languageVersionSettings: LanguageVersionSettings,
+    useBuiltInsProvider: Boolean,
+    configureJavaClassFinder: (StorageComponentContainer.() -> Unit)? = null,
+    javaClassTracker: JavaClassesTracker? = null
 ): StorageComponentContainer = createContainer("LazyResolveWithJava", JvmPlatformCompilerServices) {
-    configureModule(moduleContext, JvmPlatform, jvmTarget, JvmPlatformCompilerServices, bindingTrace)
+    configureModule(moduleContext, jvmPlatform, JvmPlatformCompilerServices, bindingTrace)
     configureJavaTopDownAnalysis(moduleContentScope, moduleContext.project, lookupTracker, expectActualTracker)
 
     if (configureJavaClassFinder != null) {
@@ -135,22 +134,22 @@ fun createContainerForLazyResolveWithJava(
 
 
 fun createContainerForTopDownAnalyzerForJvm(
-        moduleContext: ModuleContext,
-        bindingTrace: BindingTrace,
-        declarationProviderFactory: DeclarationProviderFactory,
-        moduleContentScope: GlobalSearchScope,
-        lookupTracker: LookupTracker,
-        expectActualTracker: ExpectActualTracker,
-        packagePartProvider: PackagePartProvider,
-        moduleClassResolver: ModuleClassResolver,
-        targetEnvironment: TargetEnvironment,
-        jvmTarget: JvmTarget,
-        languageVersionSettings: LanguageVersionSettings,
-        configureJavaClassFinder: (StorageComponentContainer.() -> Unit)? = null,
-        javaClassTracker: JavaClassesTracker? = null
+    jvmPlatform: TargetPlatform,
+    moduleContext: ModuleContext,
+    bindingTrace: BindingTrace,
+    declarationProviderFactory: DeclarationProviderFactory,
+    moduleContentScope: GlobalSearchScope,
+    lookupTracker: LookupTracker,
+    expectActualTracker: ExpectActualTracker,
+    packagePartProvider: PackagePartProvider,
+    moduleClassResolver: ModuleClassResolver,
+    targetEnvironment: TargetEnvironment,
+    languageVersionSettings: LanguageVersionSettings,
+    configureJavaClassFinder: (StorageComponentContainer.() -> Unit)? = null,
+    javaClassTracker: JavaClassesTracker? = null
 ): ComponentProvider = createContainerForLazyResolveWithJava(
-        moduleContext, bindingTrace, declarationProviderFactory, moduleContentScope, moduleClassResolver,
-        targetEnvironment, lookupTracker, expectActualTracker, packagePartProvider, jvmTarget, languageVersionSettings,
+        jvmPlatform, moduleContext, bindingTrace, declarationProviderFactory, moduleContentScope, moduleClassResolver,
+        targetEnvironment, lookupTracker, expectActualTracker, packagePartProvider, languageVersionSettings,
         useBuiltInsProvider = true,
         configureJavaClassFinder = configureJavaClassFinder,
         javaClassTracker = javaClassTracker

compiler/frontend.java/src/org/jetbrains/kotlin/platform/jvm/JvmPlatform.kt

@@ -0,0 +1,44 @@
+/*
+ * 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.platform.jvm
+
+import org.jetbrains.kotlin.config.JvmTarget
+import org.jetbrains.kotlin.platform.SimplePlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.toTargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
+
+abstract class JvmPlatform : SimplePlatform("JVM") {
+    override val oldFashionedDescription: String
+        get() = "JVM "
+}
+
+object JvmPlatforms {
+    private val jvmTargetToJdkPlatform: Map<JvmTarget, TargetPlatform> =
+        JvmTarget.values().map { it to JdkPlatform(it).toTargetPlatform() }.toMap()
+
+    val defaultJvmPlatform: TargetPlatform = jvmTargetToJdkPlatform[JvmTarget.DEFAULT]!!
+
+    val jvm16: TargetPlatform = jvmTargetToJdkPlatform[JvmTarget.JVM_1_6]!!
+    val jvm18: TargetPlatform = jvmTargetToJdkPlatform[JvmTarget.JVM_1_8]!!
+
+    fun jvmPlatformByTargetVersion(targetVersion: JvmTarget): TargetPlatform =
+        jvmTargetToJdkPlatform[targetVersion]!!
+
+    val allJvmPlatforms: List<TargetPlatform> = jvmTargetToJdkPlatform.values.toList()
+}
+
+data class JdkPlatform(val targetVersion: JvmTarget) : JvmPlatform() {
+    override fun toString(): String = "$platformName ($targetVersion)"
+
+    override val oldFashionedDescription: String
+        get() = "JVM " + targetVersion.description
+
+    override val targetPlatformVersion: TargetPlatformVersion
+        get() = targetVersion
+}
+
+fun TargetPlatform?.isJvm(): Boolean = this?.singleOrNull() is JvmPlatform

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/JvmResolverForModuleFactory.kt

@@ -17,9 +17,7 @@
 package org.jetbrains.kotlin.resolve.jvm
 
 import org.jetbrains.kotlin.analyzer.*
-import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.LanguageVersionSettings
-import org.jetbrains.kotlin.config.TargetPlatformVersion
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.descriptors.impl.CompositePackageFragmentProvider
@@ -30,11 +28,10 @@ import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.load.java.lazy.ModuleClassResolverImpl
 import org.jetbrains.kotlin.load.java.structure.JavaClass
 import org.jetbrains.kotlin.load.kotlin.PackagePartProvider
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.CodeAnalyzerInitializer
 import org.jetbrains.kotlin.resolve.TargetEnvironment
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.resolve.jvm.extensions.PackageFragmentProviderExtension
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.lazy.ResolveSession
 import org.jetbrains.kotlin.resolve.lazy.declarations.DeclarationProviderFactoryService
 
@@ -52,8 +49,7 @@ object JvmResolverForModuleFactory : ResolverForModuleFactory() {
         platformParameters: PlatformAnalysisParameters,
         targetEnvironment: TargetEnvironment,
         resolverForProject: ResolverForProject<M>,
-        languageVersionSettings: LanguageVersionSettings,
-        targetPlatformVersion: TargetPlatformVersion
+        languageVersionSettings: LanguageVersionSettings
     ): ResolverForModule {
         val (moduleInfo, syntheticFiles, moduleContentScope) = moduleContent
         val project = moduleContext.project
@@ -73,7 +69,7 @@ object JvmResolverForModuleFactory : ResolverForModuleFactory() {
             val resolverForReferencedModule = referencedClassModule?.let { resolverForProject.tryGetResolverForModule(it as M) }
 
             val resolverForModule = resolverForReferencedModule?.takeIf {
-                referencedClassModule.platform == JvmPlatform || referencedClassModule.platform == null
+                referencedClassModule.platform.isJvm() || referencedClassModule.platform == null
             } ?: run {
                 // in case referenced class lies outside of our resolver, resolve the class as if it is inside our module
                 // this leads to java class being resolved several times
@@ -82,12 +78,12 @@ object JvmResolverForModuleFactory : ResolverForModuleFactory() {
             resolverForModule.componentProvider.get<JavaDescriptorResolver>()
         }
 
-        val jvmTarget = targetPlatformVersion as? JvmTarget ?: JvmTarget.DEFAULT
         val trace = CodeAnalyzerInitializer.getInstance(project).createTrace()
 
         val lookupTracker = LookupTracker.DO_NOTHING
         val packagePartProvider = (platformParameters as JvmPlatformParameters).packagePartProviderFactory(moduleContent)
         val container = createContainerForLazyResolveWithJava(
+            moduleDescriptor.platform!!,
             moduleContext,
             trace,
             declarationProviderFactory,
@@ -97,7 +93,6 @@ object JvmResolverForModuleFactory : ResolverForModuleFactory() {
             lookupTracker,
             ExpectActualTracker.DoNothing,
             packagePartProvider,
-            jvmTarget,
             languageVersionSettings,
             useBuiltInsProvider = false // TODO: load built-ins from module dependencies in IDE
         )

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatform.kt

@@ -1,23 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.resolve.jvm.platform
-
-import org.jetbrains.kotlin.resolve.*
-
-object JvmPlatform : TargetPlatform("JVM") {
-    override val platform = MultiTargetPlatform.Specific(platformName)
-}

compiler/frontend/src/org/jetbrains/kotlin/analyzer/AnalyzerFacade.kt

@@ -25,7 +25,6 @@ import org.jetbrains.kotlin.builtins.DefaultBuiltIns
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
-import org.jetbrains.kotlin.config.TargetPlatformVersion
 import org.jetbrains.kotlin.container.ComponentProvider
 import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.context.ProjectContext
@@ -37,10 +36,10 @@ import org.jetbrains.kotlin.descriptors.impl.ModuleDependencies
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.resolve.CompilerEnvironment
-import org.jetbrains.kotlin.resolve.TargetEnvironment
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.storage.getValue
 import java.util.*
@@ -185,6 +184,8 @@ class ResolverForProjectImpl<M : ModuleInfo>(
 
                 val languageVersionSettings =
                     moduleLanguageSettingsProvider.getLanguageVersionSettings(module, projectContext.project, isReleaseCoroutines)
+
+                // FIXME(dsavvinov): make sure that module.platform returns platform with the same JvmTarget as this one
                 val targetPlatformVersion = moduleLanguageSettingsProvider.getTargetPlatform(module, projectContext.project)
 
                 val resolverForModuleFactory = resolverForModuleFactoryByPlatform(module.platform)
@@ -195,8 +196,7 @@ class ResolverForProjectImpl<M : ModuleInfo>(
                     platformParameters(module.platform ?: TODO("Missing platform!")),
                     targetEnvironment,
                     this@ResolverForProjectImpl,
-                    languageVersionSettings,
-                    targetPlatformVersion
+                    languageVersionSettings
                 )
             }
         }
@@ -255,7 +255,7 @@ class ResolverForProjectImpl<M : ModuleInfo>(
             module.name,
             projectContext.storageManager,
             builtIns,
-            module.platform?.multiTargetPlatform,
+            module.platform,
             module.capabilities,
             module.stableName
         )
@@ -304,8 +304,7 @@ abstract class ResolverForModuleFactory {
         platformParameters: PlatformAnalysisParameters,
         targetEnvironment: TargetEnvironment,
         resolverForProject: ResolverForProject<M>,
-        languageVersionSettings: LanguageVersionSettings,
-        targetPlatformVersion: TargetPlatformVersion
+        languageVersionSettings: LanguageVersionSettings
     ): ResolverForModule
 }
 

compiler/frontend/src/org/jetbrains/kotlin/analyzer/common/CommonPlatform.kt

@@ -17,11 +17,6 @@ import org.jetbrains.kotlin.resolve.scopes.SyntheticScopes
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.types.DynamicTypesSettings
 
-object CommonPlatform : TargetPlatform("Default") {
-    override val platform: MultiTargetPlatform
-        get() = MultiTargetPlatform.Common
-}
-
 private object CommonPlatformConfigurator : PlatformConfiguratorBase(
     DynamicTypesSettings(), listOf(), listOf(), listOf(), listOf(), listOf(),
     IdentifierChecker.Default, OverloadFilter.Default, PlatformToKotlinClassMap.EMPTY, DelegationFilter.Default,

compiler/frontend/src/org/jetbrains/kotlin/checkers/utils/CheckerTestUtil.kt

@@ -20,17 +20,18 @@ import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.psi.KtCallableDeclaration
 import org.jetbrains.kotlin.psi.KtExpression
 import org.jetbrains.kotlin.psi.KtReferenceExpression
 import org.jetbrains.kotlin.psi.psiUtil.endOffset
 import org.jetbrains.kotlin.psi.psiUtil.startOffset
-import org.jetbrains.kotlin.resolve.AnalyzingUtils
-import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
+import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.calls.callUtil.getType
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfo
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactory
+import org.jetbrains.kotlin.platform.isCommon
+import org.jetbrains.kotlin.platform.oldFashionedDescription
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.expressions.typeInfoFactory.noTypeInfo
 import java.util.*
@@ -48,7 +49,7 @@ object CheckerTestUtil {
 
     fun getDiagnosticsIncludingSyntaxErrors(
         bindingContext: BindingContext,
-        implementingModulesBindings: List<Pair<MultiTargetPlatform, BindingContext>>,
+        implementingModulesBindings: List<Pair<TargetPlatform, BindingContext>>,
         root: PsiElement,
         markDynamicCalls: Boolean,
         dynamicCallDescriptors: MutableList<DeclarationDescriptor>,
@@ -70,10 +71,11 @@ object CheckerTestUtil {
             moduleDescriptor,
             diagnosedRanges
         )
-        val sortedBindings = implementingModulesBindings.sortedBy { it.first }
+
+        val sortedBindings = implementingModulesBindings.sortedBy { it.first.oldFashionedDescription }
 
         for ((platform, second) in sortedBindings) {
-            assert(platform is MultiTargetPlatform.Specific) { "Implementing module must have a specific platform: $platform" }
+            assert(!platform.isCommon()) { "Implementing module must have a specific platform: $platform" }
 
             result.addAll(
                 getDiagnosticsIncludingSyntaxErrors(
@@ -81,7 +83,7 @@ object CheckerTestUtil {
                     root,
                     markDynamicCalls,
                     dynamicCallDescriptors,
-                    (platform as MultiTargetPlatform.Specific).platform,
+                    platform.single().platformName,
                     withNewInference,
                     languageVersionSettings,
                     dataFlowValueFactory,

compiler/frontend/src/org/jetbrains/kotlin/context/context.kt

@@ -22,7 +22,7 @@ import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.PackageFragmentProvider
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.storage.ExceptionTracker
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
 import org.jetbrains.kotlin.storage.StorageManager
@@ -99,8 +99,8 @@ fun ContextForNewModule(
     projectContext: ProjectContext,
     moduleName: Name,
     builtIns: KotlinBuiltIns,
-    multiTargetPlatform: MultiTargetPlatform?
+    platform: TargetPlatform?
 ): MutableModuleContext {
-    val module = ModuleDescriptorImpl(moduleName, projectContext.storageManager, builtIns, multiTargetPlatform)
+    val module = ModuleDescriptorImpl(moduleName, projectContext.storageManager, builtIns, platform)
     return MutableModuleContextImpl(module, projectContext)
 }

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/Renderers.kt

@@ -31,6 +31,7 @@ import org.jetbrains.kotlin.descriptors.impl.TypeAliasConstructorDescriptor
 import org.jetbrains.kotlin.diagnostics.rendering.TabledDescriptorRenderer.newTable
 import org.jetbrains.kotlin.diagnostics.rendering.TabledDescriptorRenderer.newText
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.isCommon
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.renderer.DescriptorRenderer.Companion.DEBUG_TEXT
@@ -85,11 +86,10 @@ object Renderers {
 
     @JvmField
     val PLATFORM = Renderer<ModuleDescriptor> {
-        val platform = it.getMultiTargetPlatform()
-        " ${it.getCapability(ModuleInfo.Capability)?.displayedName ?: ""}" + when (platform) {
-            MultiTargetPlatform.Common -> ""
-            is MultiTargetPlatform.Specific -> " for " + platform.platform
-            null -> ""
+        val platform = it.platform
+        " ${it.getCapability(ModuleInfo.Capability)?.displayedName ?: ""}" + when {
+            platform == null || platform.isCommon() -> ""
+            else -> " for " + platform.single().platformName
         }
     }
 

compiler/frontend/src/org/jetbrains/kotlin/extensions/StorageComponentContainerContributor.kt

@@ -18,7 +18,7 @@ package org.jetbrains.kotlin.extensions
 
 import org.jetbrains.kotlin.container.StorageComponentContainer
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 
 interface StorageComponentContainerContributor {
     companion object : ProjectExtensionDescriptor<StorageComponentContainerContributor>(

compiler/frontend/src/org/jetbrains/kotlin/frontend/di/injection.kt

@@ -16,11 +16,10 @@
 
 package org.jetbrains.kotlin.frontend.di
 
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.analyzer.common.CommonPlatformCompilerServices
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
-import org.jetbrains.kotlin.config.TargetPlatformVersion
 import org.jetbrains.kotlin.container.StorageComponentContainer
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.container.useImpl
@@ -29,7 +28,9 @@ import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.extensions.StorageComponentContainerContributor
 import org.jetbrains.kotlin.incremental.components.ExpectActualTracker
 import org.jetbrains.kotlin.incremental.components.LookupTracker
+import org.jetbrains.kotlin.platform.subplatformOfType
 import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.calls.components.ClassicTypeSystemContextForCS
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactoryImpl
@@ -46,7 +47,6 @@ import org.jetbrains.kotlin.types.expressions.LocalLazyDeclarationResolver
 fun StorageComponentContainer.configureModule(
     moduleContext: ModuleContext,
     platform: TargetPlatform,
-    platformVersion: TargetPlatformVersion,
     compilerServices: PlatformDependentCompilerServices
 ) {
     useInstance(moduleContext)
@@ -56,8 +56,8 @@ fun StorageComponentContainer.configureModule(
     useInstance(moduleContext.module.builtIns)
 
     useInstance(platform)
-    useInstance(platformVersion)
     useInstance(compilerServices)
+    useInstance(platform.componentPlatforms.singleOrNull()?.targetPlatformVersion ?: TargetPlatformVersion.NoVersion)
 
     compilerServices.platformConfigurator.configureModuleComponents(this)
     compilerServices.platformConfigurator.configureModuleDependentCheckers(this)
@@ -83,11 +83,10 @@ private fun StorageComponentContainer.configurePlatformIndependentComponents() {
 fun StorageComponentContainer.configureModule(
     moduleContext: ModuleContext,
     platform: TargetPlatform,
-    platformVersion: TargetPlatformVersion,
     compilerServices: PlatformDependentCompilerServices,
     trace: BindingTrace
 ) {
-    configureModule(moduleContext, platform, platformVersion, compilerServices)
+    configureModule(moduleContext, platform, compilerServices)
     useInstance(trace)
 }
 
@@ -96,11 +95,10 @@ fun createContainerForBodyResolve(
     bindingTrace: BindingTrace,
     platform: TargetPlatform,
     statementFilter: StatementFilter,
-    targetPlatformVersion: TargetPlatformVersion,
     compilerServices: PlatformDependentCompilerServices,
     languageVersionSettings: LanguageVersionSettings
 ): StorageComponentContainer = createContainer("BodyResolve", compilerServices) {
-    configureModule(moduleContext, platform, targetPlatformVersion, compilerServices, bindingTrace)
+    configureModule(moduleContext, platform, compilerServices, bindingTrace)
 
     useInstance(statementFilter)
 
@@ -118,11 +116,10 @@ fun createContainerForLazyBodyResolve(
     bindingTrace: BindingTrace,
     platform: TargetPlatform,
     bodyResolveCache: BodyResolveCache,
-    targetPlatformVersion: TargetPlatformVersion,
     compilerServices: PlatformDependentCompilerServices,
     languageVersionSettings: LanguageVersionSettings
 ): StorageComponentContainer = createContainer("LazyBodyResolve", compilerServices) {
-    configureModule(moduleContext, platform, targetPlatformVersion, compilerServices, bindingTrace)
+    configureModule(moduleContext, platform, compilerServices, bindingTrace)
 
     useInstance(kotlinCodeAnalyzer)
     useInstance(kotlinCodeAnalyzer.fileScopeProvider)
@@ -139,13 +136,12 @@ fun createContainerForLazyLocalClassifierAnalyzer(
     bindingTrace: BindingTrace,
     platform: TargetPlatform,
     lookupTracker: LookupTracker,
-    targetPlatformVersion: TargetPlatformVersion,
     languageVersionSettings: LanguageVersionSettings,
     statementFilter: StatementFilter,
     localClassDescriptorHolder: LocalClassDescriptorHolder,
     compilerServices: PlatformDependentCompilerServices
 ): StorageComponentContainer = createContainer("LocalClassifierAnalyzer", compilerServices) {
-    configureModule(moduleContext, platform, targetPlatformVersion, compilerServices, bindingTrace)
+    configureModule(moduleContext, platform, compilerServices, bindingTrace)
 
     useInstance(localClassDescriptorHolder)
     useInstance(lookupTracker)
@@ -173,12 +169,11 @@ fun createContainerForLazyResolve(
     declarationProviderFactory: DeclarationProviderFactory,
     bindingTrace: BindingTrace,
     platform: TargetPlatform,
-    targetPlatformVersion: TargetPlatformVersion,
     compilerServices: PlatformDependentCompilerServices,
     targetEnvironment: TargetEnvironment,
     languageVersionSettings: LanguageVersionSettings
 ): StorageComponentContainer = createContainer("LazyResolve", compilerServices) {
-    configureModule(moduleContext, platform, targetPlatformVersion, compilerServices, bindingTrace)
+    configureModule(moduleContext, platform, compilerServices, bindingTrace)
 
     useInstance(declarationProviderFactory)
     useInstance(languageVersionSettings)
@@ -192,13 +187,13 @@ fun createContainerForLazyResolve(
     useImpl<SubstitutingScopeProviderImpl>()
 }
 
+// TODO: remove it
 fun createLazyResolveSession(moduleContext: ModuleContext, files: Collection<KtFile>): ResolveSession =
     createContainerForLazyResolve(
         moduleContext,
         FileBasedDeclarationProviderFactory(moduleContext.storageManager, files),
         BindingTraceContext(),
-        CommonPlatform,
-        TargetPlatformVersion.NoVersion,
+        DefaultBuiltInPlatforms.commonPlatform,
         CommonPlatformCompilerServices,
         CompilerEnvironment,
         LanguageVersionSettingsImpl.DEFAULT

compiler/frontend/src/org/jetbrains/kotlin/resolve/OverloadResolver.kt

@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.idea.MainFunctionDetector
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.name.FqNameUnsafe
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.resolve.descriptorUtil.platform
 
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import java.util.*
@@ -290,7 +291,7 @@ class OverloadResolver(
         if (member1 !is MemberDescriptor || member2 !is MemberDescriptor) return false
 
         return member1.isActual && member2.isActual &&
-                member1.getMultiTargetPlatform() != member2.getMultiTargetPlatform()
+                member1.platform != member2.platform
     }
 
     private fun reportRedeclarations(redeclarations: Collection<DeclarationDescriptorNonRoot>) {

compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/OptionalExpectationUsageChecker.kt

@@ -9,9 +9,8 @@ import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.descriptors.ClassifierDescriptor
 import org.jetbrains.kotlin.diagnostics.Errors
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
-import org.jetbrains.kotlin.resolve.descriptorUtil.module
-import org.jetbrains.kotlin.resolve.getMultiTargetPlatform
+import org.jetbrains.kotlin.resolve.descriptorUtil.platform
+import org.jetbrains.kotlin.platform.isCommon
 import org.jetbrains.kotlin.resolve.multiplatform.isCommonSource
 
 class OptionalExpectationUsageChecker : ClassifierUsageChecker {
@@ -23,8 +22,9 @@ class OptionalExpectationUsageChecker : ClassifierUsageChecker {
         }
 
         val ktFile = element.containingFile as KtFile
+        // TODO(dsavvinov): unify for compiler/IDE
         // The first part is for the compiler, and the second one is for IDE
-        if (ktFile.isCommonSource != true && targetDescriptor.module.getMultiTargetPlatform() != MultiTargetPlatform.Common) {
+        if (ktFile.isCommonSource != true && !targetDescriptor.platform.isCommon()) {
             context.trace.report(Errors.OPTIONAL_DECLARATION_USAGE_IN_NON_COMMON_SOURCE.on(element))
         }
     }

compiler/frontend/src/org/jetbrains/kotlin/types/expressions/LocalClassifierAnalyzer.kt

@@ -18,8 +18,8 @@ package org.jetbrains.kotlin.types.expressions
 
 import com.intellij.psi.PsiElement
 import com.intellij.psi.util.PsiTreeUtil
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.config.LanguageVersionSettings
-import org.jetbrains.kotlin.config.TargetPlatformVersion
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.context.GlobalContext
 import org.jetbrains.kotlin.context.withModule
@@ -64,7 +64,6 @@ class LocalClassifierAnalyzer(
     private val compilerServices: PlatformDependentCompilerServices,
     private val lookupTracker: LookupTracker,
     private val supertypeLoopChecker: SupertypeLoopChecker,
-    private val targetPlatformVersion: TargetPlatformVersion,
     private val languageVersionSettings: LanguageVersionSettings,
     private val delegationFilter: DelegationFilter,
     private val wrappedTypeFactory: WrappedTypeFactory,
@@ -84,7 +83,6 @@ class LocalClassifierAnalyzer(
             context.trace,
             platform,
             lookupTracker,
-            targetPlatformVersion,
             languageVersionSettings,
             context.statementFilter,
             LocalClassDescriptorHolder(

compiler/tests-common/tests/org/jetbrains/kotlin/checkers/AbstractDiagnosticsTest.kt

@@ -39,6 +39,11 @@ import org.jetbrains.kotlin.load.java.lazy.SingleModuleClassResolver
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.name.SpecialNames
+import org.jetbrains.kotlin.platform.CommonPlatforms
+import org.jetbrains.kotlin.platform.isCommon
+import org.jetbrains.kotlin.platform.js.JsPlatforms
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.konan.KonanPlatforms
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.calls.model.MutableResolvedCall
@@ -166,13 +171,13 @@ abstract class AbstractDiagnosticsTest : BaseDiagnosticsTest() {
         val actualText = StringBuilder()
         for (testFile in files) {
             val module = testFile.module
-            val isCommonModule = modules[module]!!.getMultiTargetPlatform() == MultiTargetPlatform.Common
+            val isCommonModule = modules[module]!!.platform.isCommon()
             val implementingModules =
                 if (!isCommonModule) emptyList()
                 else modules.entries.filter { (testModule) -> module in testModule?.getDependencies().orEmpty() }
             val implementingModulesBindings = implementingModules.mapNotNull { (testModule, moduleDescriptor) ->
-                val platform = moduleDescriptor.getCapability(MultiTargetPlatform.CAPABILITY)
-                if (platform is MultiTargetPlatform.Specific) platform to moduleBindings[testModule]!!
+                val platform = moduleDescriptor.platform
+                if (platform != null && !platform.isCommon()) platform to moduleBindings[testModule]!!
                 else null
             }
             val moduleDescriptor = modules[module]!!
@@ -356,12 +361,11 @@ abstract class AbstractDiagnosticsTest : BaseDiagnosticsTest() {
 
         val moduleDescriptor = moduleContext.module as ModuleDescriptorImpl
 
-        val platform = moduleDescriptor.getMultiTargetPlatform()
-        if (platform == MultiTargetPlatform.Common) {
+        val platform = moduleDescriptor.platform
+        if (platform.isCommon()) {
             return CommonResolverForModuleFactory.analyzeFiles(
                 files, moduleDescriptor.name, true, languageVersionSettings,
                 mapOf(
-                    MultiTargetPlatform.CAPABILITY to MultiTargetPlatform.Common,
                     MODULE_FILES to files
                 )
             ) { _ ->
@@ -377,6 +381,7 @@ abstract class AbstractDiagnosticsTest : BaseDiagnosticsTest() {
         val moduleClassResolver = SingleModuleClassResolver()
 
         val container = createContainerForTopDownAnalyzerForJvm(
+            JvmPlatforms.jvmPlatformByTargetVersion(jvmTarget), // TODO(dsavvinov): do not pass JvmTarget around
             moduleContext,
             moduleTrace,
             FileBasedDeclarationProviderFactory(moduleContext.storageManager, files),
@@ -386,7 +391,6 @@ abstract class AbstractDiagnosticsTest : BaseDiagnosticsTest() {
             environment.createPackagePartProvider(moduleContentScope),
             moduleClassResolver,
             CompilerEnvironment,
-            jvmTarget,
             languageVersionSettings
         )
 
@@ -417,7 +421,7 @@ abstract class AbstractDiagnosticsTest : BaseDiagnosticsTest() {
         // E.g. "<!JVM:ACTUAL_WITHOUT_EXPECT!>...<!>
         val result = ArrayList<KtFile>(0)
         for (dependency in dependencies) {
-            if (dependency.getCapability(MultiTargetPlatform.CAPABILITY) == MultiTargetPlatform.Common) {
+            if (dependency.platform.isCommon()) {
                 val files = dependency.getCapability(MODULE_FILES)
                         ?: error("MODULE_FILES should have been set for the common module: $dependency")
                 result.addAll(files)
@@ -585,10 +589,16 @@ abstract class AbstractDiagnosticsTest : BaseDiagnosticsTest() {
         emptyList()
 
     protected open fun createModule(moduleName: String, storageManager: StorageManager): ModuleDescriptorImpl {
-        val nameSuffix = moduleName.substringAfterLast("-", "")
+        val nameSuffix = moduleName.substringAfterLast("-", "").toUpperCase()
         val platform =
-            if (nameSuffix.isEmpty()) null
-            else if (nameSuffix == "common") MultiTargetPlatform.Common else MultiTargetPlatform.Specific(nameSuffix.toUpperCase())
+            when {
+                nameSuffix.isEmpty() -> null // TODO(dsavvinov): this leads to 'null'-platform in ModuleDescriptor
+                nameSuffix == "COMMON" -> CommonPlatforms.defaultCommonPlatform
+                nameSuffix == "JVM" -> JvmPlatforms.defaultJvmPlatform // TODO(dsavvinov): determine JvmTarget precisely
+                nameSuffix == "JS" -> JsPlatforms.defaultJsPlatform
+                nameSuffix == "NATIVE" -> KonanPlatforms.defaultKonanPlatform
+                else -> throw IllegalStateException("Can't determine platform by name $nameSuffix")
+            }
         val builtIns = JvmBuiltIns(storageManager, JvmBuiltIns.Kind.FROM_CLASS_LOADER)
         return ModuleDescriptorImpl(Name.special("<$moduleName>"), storageManager, builtIns, platform)
     }

compiler/tests-common/tests/org/jetbrains/kotlin/checkers/BaseDiagnosticsTest.kt

@@ -45,7 +45,7 @@ import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactoryImpl
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.jetbrains.kotlin.utils.addIfNotNull
@@ -223,7 +223,7 @@ abstract class BaseDiagnosticsTest : KotlinMultiFileTestWithJava<TestModule, Tes
 
         fun getActualText(
             bindingContext: BindingContext,
-            implementingModulesBindings: List<Pair<MultiTargetPlatform, BindingContext>>,
+            implementingModulesBindings: List<Pair<TargetPlatform, BindingContext>>,
             actualText: StringBuilder,
             skipJvmSignatureDiagnostics: Boolean,
             languageVersionSettings: LanguageVersionSettings,

compiler/tests-common/tests/org/jetbrains/kotlin/fir/FirTestModuleInfo.kt

@@ -7,15 +7,15 @@ package org.jetbrains.kotlin.fir
 
 import org.jetbrains.kotlin.analyzer.ModuleInfo
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 
 class FirTestModuleInfo(
     override val name: Name = Name.identifier("TestModule"),
     val dependencies: MutableList<ModuleInfo> = mutableListOf(),
-    override val platform: TargetPlatform = JvmPlatform,
+    override val platform: TargetPlatform = JvmPlatforms.defaultJvmPlatform,
     override val compilerServices: PlatformDependentCompilerServices = JvmPlatformCompilerServices
 ) : ModuleInfo {
     override fun dependencies(): List<ModuleInfo> = dependencies

compiler/tests-common/tests/org/jetbrains/kotlin/resolve/lazy/lazyResolveTestUtils.kt

@@ -22,17 +22,17 @@ import org.jetbrains.kotlin.analyzer.LanguageSettingsProvider
 import org.jetbrains.kotlin.analyzer.ModuleContent
 import org.jetbrains.kotlin.analyzer.ModuleInfo
 import org.jetbrains.kotlin.analyzer.ResolverForProjectImpl
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
-import org.jetbrains.kotlin.analyzer.common.CommonPlatformCompilerServices
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.context.ProjectContext
 import org.jetbrains.kotlin.load.kotlin.PackagePartProvider
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.resolve.jvm.JvmResolverForModuleFactory
 import org.jetbrains.kotlin.resolve.jvm.JvmPlatformParameters
+import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 
 fun createResolveSessionForFiles(
         project: Project,
@@ -67,8 +67,8 @@ private class TestModule(val dependsOnBuiltIns: Boolean) : ModuleInfo {
                 ModuleInfo.DependencyOnBuiltIns.NONE
 
     override val platform: TargetPlatform
-        get() = CommonPlatform
+        get() = JvmPlatforms.defaultJvmPlatform
 
     override val compilerServices: PlatformDependentCompilerServices?
-        get() = CommonPlatformCompilerServices
+        get() = JvmPlatformCompilerServices
 }

compiler/tests-common/tests/org/jetbrains/kotlin/test/util/RecursiveDescriptorComparator.java

@@ -28,10 +28,10 @@ import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.descriptors.impl.SubpackagesScope;
 import org.jetbrains.kotlin.jvm.compiler.ExpectedLoadErrorsUtil;
 import org.jetbrains.kotlin.name.FqName;
+import org.jetbrains.kotlin.platform.TargetPlatformKt;
 import org.jetbrains.kotlin.renderer.*;
 import org.jetbrains.kotlin.resolve.DescriptorUtils;
 import org.jetbrains.kotlin.resolve.MemberComparator;
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform;
 import org.jetbrains.kotlin.resolve.scopes.ChainedMemberScope;
 import org.jetbrains.kotlin.resolve.scopes.MemberScope;
 import org.jetbrains.kotlin.test.KotlinTestUtils;
@@ -243,7 +243,7 @@ public class RecursiveDescriptorComparator {
 
         // 'expected' declarations do not belong to the platform-specific module, even though they participate in the analysis
         if (descriptor instanceof MemberDescriptor && ((MemberDescriptor) descriptor).isExpect() &&
-            module.getCapability(MultiTargetPlatform.CAPABILITY) != MultiTargetPlatform.Common.INSTANCE) return false;
+            !TargetPlatformKt.isCommon(module.getPlatform())) return false;
 
         return module.equals(DescriptorUtils.getContainingModule(descriptor));
     }

compiler/tests-common/tests/org/jetbrains/kotlin/tests/di/injection.kt

@@ -17,7 +17,6 @@
 package org.jetbrains.kotlin.tests.di
 
 import com.intellij.openapi.project.Project
-import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
 import org.jetbrains.kotlin.container.StorageComponentContainer
 import org.jetbrains.kotlin.container.getValue
@@ -26,9 +25,9 @@ import org.jetbrains.kotlin.container.useInstance
 import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.frontend.di.configureModule
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactory
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 import org.jetbrains.kotlin.types.SubstitutingScopeProviderImpl
 import org.jetbrains.kotlin.types.expressions.ExpressionTypingServices
@@ -36,7 +35,8 @@ import org.jetbrains.kotlin.types.expressions.FakeCallResolver
 
 fun createContainerForTests(project: Project, module: ModuleDescriptor): ContainerForTests {
     return ContainerForTests(createContainer("Tests", JvmPlatformCompilerServices) {
-        configureModule(ModuleContext(module, project), JvmPlatform, JvmTarget.DEFAULT, JvmPlatformCompilerServices)
+        configureModule(ModuleContext(module, project),
+                        JvmPlatforms.defaultJvmPlatform, JvmPlatformCompilerServices)
         useInstance(LanguageVersionSettingsImpl.DEFAULT)
         useImpl<SubstitutingScopeProviderImpl>()
         useImpl<AnnotationResolverImpl>()

compiler/tests/org/jetbrains/kotlin/jvm/compiler/MultiModuleJavaAnalysisCustomTest.kt

@@ -35,13 +35,13 @@ import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.resolve.constants.EnumValue
 import org.jetbrains.kotlin.resolve.descriptorUtil.annotationClass
 import org.jetbrains.kotlin.resolve.descriptorUtil.module
 import org.jetbrains.kotlin.resolve.jvm.JvmResolverForModuleFactory
 import org.jetbrains.kotlin.resolve.jvm.JvmPlatformParameters
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 import org.jetbrains.kotlin.test.ConfigurationKind
 import org.jetbrains.kotlin.test.KotlinTestUtils
@@ -62,7 +62,7 @@ class MultiModuleJavaAnalysisCustomTest : KtUsefulTestCase() {
         override val name = Name.special("<$_name>")
 
         override val platform: TargetPlatform
-            get() = JvmPlatform
+            get() = JvmPlatforms.defaultJvmPlatform
 
         override val compilerServices: PlatformDependentCompilerServices?
             get() = JvmPlatformCompilerServices

compiler/util/src/org/jetbrains/kotlin/config/TargetPlatformVersion.kt

@@ -1,25 +0,0 @@
-/*
- * Copyright 2010-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.config
-
-import org.jetbrains.kotlin.utils.DescriptionAware
-
-interface TargetPlatformVersion : DescriptionAware {
-    object NoVersion : TargetPlatformVersion {
-        override val description = ""
-    }
-}

core/descriptors/src/org/jetbrains/kotlin/descriptors/ModuleDescriptor.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.descriptors
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.TargetPlatform
 
 interface ModuleDescriptor : DeclarationDescriptor {
     override fun getContainingDeclaration(): DeclarationDescriptor? = null
@@ -30,6 +31,10 @@ interface ModuleDescriptor : DeclarationDescriptor {
      */
     val stableName: Name?
 
+    // NB: this field should actually be non-null, but making it so implies a LOT of work, so we postpone it for a moment
+    // TODO: make it non-null
+    val platform: TargetPlatform?
+
     fun shouldSeeInternalsOf(targetModule: ModuleDescriptor): Boolean
 
     override fun <R, D> accept(visitor: DeclarationDescriptorVisitor<R, D>, data: D): R {

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/ModuleDescriptorImpl.kt

@@ -24,7 +24,7 @@ import org.jetbrains.kotlin.descriptors.PackageViewDescriptor
 import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.utils.sure
 import java.lang.IllegalArgumentException
@@ -34,8 +34,8 @@ class ModuleDescriptorImpl @JvmOverloads constructor(
     private val storageManager: StorageManager,
     override val builtIns: KotlinBuiltIns,
     // May be null in compiler context, should be not-null in IDE context
-    multiTargetPlatform: MultiTargetPlatform? = null,
-    capabilities: Map<ModuleDescriptor.Capability<*>, Any?> = emptyMap(),
+    override val platform: TargetPlatform? = null,
+    private val capabilities: Map<ModuleDescriptor.Capability<*>, Any?> = emptyMap(),
     override val stableName: Name? = null
 ) : DeclarationDescriptorImpl(Annotations.EMPTY, moduleName), ModuleDescriptor {
     init {
@@ -44,8 +44,6 @@ class ModuleDescriptorImpl @JvmOverloads constructor(
         }
     }
 
-    private val capabilities = capabilities + (multiTargetPlatform?.let { mapOf(MultiTargetPlatform.CAPABILITY to it) } ?: emptyMap())
-
     private var dependencies: ModuleDependencies? = null
     private var packageFragmentProviderForModuleContent: PackageFragmentProvider? = null
 

core/descriptors/src/org/jetbrains/kotlin/platform/TargetPlatform.kt

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.platform
+
+/**
+ * Core abstraction of Platform API, represents a collection of platforms.
+ *
+ * This is the primarily abstraction intended to use in the most part of API, as, usually,
+ * pretty much anything that may have a platform, may have a several platforms as well in the
+ * context of multiplatform projects.
+ *
+ * Please, use it over the [SimplePlatform] unless you're absolutely sure what you're doing.
+ *
+ * NB. Even in cases, where some part of logic makes sense only for a particular platform (e.g., JVM),
+ * it still can be applicable for [TargetPlatform]s with [componentPlatforms] > 1, e.g. when it consists
+ * of two version of JDK, JDK and Android, several versions of Android API, etc.
+ */
+data class TargetPlatform(val componentPlatforms: Set<SimplePlatform>) : Collection<SimplePlatform> by componentPlatforms {
+    init {
+        if (componentPlatforms.isEmpty()) throw IllegalArgumentException("Don't instantiate TargetPlatform with empty set of platforms")
+    }
+
+    override fun toString(): String = presentableDescription
+}
+
+/**
+ * Core abstraction of Platform API, represents exactly one platform.
+ *
+ * API guarantees:
+ *
+ * - direct inheritors are well-known and represent three major platforms supported at the moment (JVM, JS, Native)
+ *
+ * - exact enumeration of all inheritors isn't available at the compile time, see [CommonPlatforms]
+ *
+ * - each implementation should support equality in a broad sense of "absolutely the same platform"
+ *
+ * - it is _prohibited_ to create instances of [SimplePlatform] in the client's code, use respective factory instance (e.g., [JvmPlatforms])
+ *  to get instances of platforms
+ *
+ * Ideally, each specific subtype should be either a data class or singleton.
+ */
+abstract class SimplePlatform(val platformName: String) {
+    override fun toString(): String = platformName
+
+    /** See KDoc for [TargetPlatform.oldFashionedDescription] */
+    abstract val oldFashionedDescription: String
+
+    // FIXME(dsavvinov): hack to allow injection inject JvmTarget into container.
+    //   Proper fix would be to rewrite clients to get JdkPlatform from container, and pull JvmTarget from it
+    //   (this will also remove need in TargetPlatformVersion as the whole, and, in particular, ugly passing
+    //   of TargetPlatformVersion.NoVersion in non-JVM code)
+    open val targetPlatformVersion: TargetPlatformVersion = TargetPlatformVersion.NoVersion
+}
+
+interface TargetPlatformVersion {
+    val description: String
+
+    object NoVersion : TargetPlatformVersion {
+        override val description = ""
+    }
+}
+
+fun TargetPlatform?.isCommon(): Boolean = this != null && this.size > 1
+
+fun SimplePlatform.toTargetPlatform(): TargetPlatform = TargetPlatform(setOf(this))

core/descriptors/src/org/jetbrains/kotlin/platform/platformUtil.kt

@@ -0,0 +1,38 @@
+/*
+ * 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.platform
+
+inline fun <reified T : SimplePlatform> TargetPlatform.subplatformOfType(): T? = componentPlatforms.filterIsInstance<T>().singleOrNull()
+fun <T> TargetPlatform.subplatformOfType(klass: Class<T>): T? = componentPlatforms.filterIsInstance(klass).singleOrNull()
+
+inline fun <reified T : SimplePlatform> TargetPlatform?.has(): Boolean = this != null && subplatformOfType<T>() != null
+fun <T> TargetPlatform?.has(klass: Class<T>): Boolean = this != null && subplatformOfType(klass) != null
+
+
+/**
+ * Returns human-readable description, mapping multiplatform to 'Common (experimental)',
+ * as well as maintaining some quirks of the previous representation, like trailing whitespaces
+ *
+ * It is needed mainly for backwards compatibility, because some subsystem actually
+ * managed to rely on the format of that string. In particular, 'facetSerialization.kt' uses
+ * those string as keys in serialized `.iml`-file, and changing format of that string (including
+ * trimming pointless whitespaces) leads to incorrectly deserialized facets.
+ *
+ * New clients are encouraged to use [presentableDescription] description instead, as it
+ * also provides better description for multiplatforms.
+ */
+val TargetPlatform.oldFashionedDescription: String
+    get() = if (this.isCommon()) "Common (experimental) " else this.single().oldFashionedDescription
+
+
+/**
+ * Renders multiplatform in form
+ *      '$PLATFORM_1 / $PLATFORM_2 / ...'
+ * e.g.
+ *      'JVM (1.8) / JS / Native'
+ */
+val TargetPlatform.presentableDescription: String
+    get() = componentPlatforms.joinToString(separator = "/")

core/descriptors/src/org/jetbrains/kotlin/resolve/DescriptorUtils.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.name.FqNameUnsafe
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.DescriptorUtils.getContainingClass
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.constants.ConstantValue
 import org.jetbrains.kotlin.resolve.constants.EnumValue
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
@@ -57,6 +58,9 @@ val DeclarationDescriptor.isExtension: Boolean
 val DeclarationDescriptor.module: ModuleDescriptor
     get() = DescriptorUtils.getContainingModule(this)
 
+val DeclarationDescriptor.platform: TargetPlatform?
+    get() = module.platform
+
 fun ModuleDescriptor.resolveTopLevelClass(topLevelClassFqName: FqName, location: LookupLocation): ClassDescriptor? {
     assert(!topLevelClassFqName.isRoot)
     return getPackage(topLevelClassFqName.parent()).memberScope.getContributedClassifier(

core/descriptors/src/org/jetbrains/kotlin/resolve/MultiTargetPlatform.kt

@@ -1,47 +0,0 @@
-/*
- * Copyright 2010-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.resolve
-
-import org.jetbrains.kotlin.descriptors.MemberDescriptor
-import org.jetbrains.kotlin.descriptors.ModuleDescriptor
-import org.jetbrains.kotlin.resolve.descriptorUtil.module
-
-sealed class MultiTargetPlatform : Comparable<MultiTargetPlatform> {
-    object Common : MultiTargetPlatform() {
-        override fun compareTo(other: MultiTargetPlatform): Int =
-                if (other is Common) 0 else -1
-    }
-
-    data class Specific(val platform: String) : MultiTargetPlatform() {
-        override fun compareTo(other: MultiTargetPlatform): Int =
-                when (other) {
-                    is Common -> 1
-                    is Specific -> platform.compareTo(other.platform)
-                }
-    }
-
-    companion object {
-        @JvmField
-        val CAPABILITY = ModuleDescriptor.Capability<MultiTargetPlatform>("MULTI_TARGET_PLATFORM")
-    }
-}
-
-fun ModuleDescriptor.getMultiTargetPlatform(): MultiTargetPlatform? =
-        module.getCapability(MultiTargetPlatform.CAPABILITY)
-
-fun MemberDescriptor.getMultiTargetPlatform(): String? =
-        (module.getMultiTargetPlatform() as? MultiTargetPlatform.Specific)?.platform

core/descriptors/src/org/jetbrains/kotlin/types/ErrorUtils.java

@@ -30,6 +30,7 @@ import org.jetbrains.kotlin.descriptors.impl.TypeParameterDescriptorImpl;
 import org.jetbrains.kotlin.incremental.components.LookupLocation;
 import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
+import org.jetbrains.kotlin.platform.TargetPlatform;
 import org.jetbrains.kotlin.resolve.descriptorUtil.DescriptorUtilsKt;
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter;
 import org.jetbrains.kotlin.resolve.scopes.MemberScope;
@@ -80,6 +81,12 @@ public class ErrorUtils {
                 return Name.special("<ERROR MODULE>");
             }
 
+            @Nullable
+            @Override
+            public TargetPlatform getPlatform() {
+                return null;
+            }
+
             @NotNull
             @Override
             public PackageViewDescriptor getPackage(@NotNull FqName fqName) {

idea/ide-common/src/org/jetbrains/kotlin/caches/resolve/KotlinCacheService.kt

@@ -22,7 +22,7 @@ import com.intellij.psi.PsiFile
 import org.jetbrains.kotlin.analyzer.ModuleInfo
 import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
 import org.jetbrains.kotlin.psi.KtElement
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.diagnostics.KotlinSuppressCache
 
 interface KotlinCacheService {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/lightClasses/IDELightClassContexts.kt

@@ -51,6 +51,7 @@ import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getElementTextWithContext
 import org.jetbrains.kotlin.resolve.*
@@ -63,7 +64,6 @@ import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfoFactory
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactory
 import org.jetbrains.kotlin.resolve.calls.util.CallMaker
 import org.jetbrains.kotlin.resolve.constants.evaluate.ConstantExpressionEvaluator
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
 import org.jetbrains.kotlin.resolve.lazy.FileScopeProviderImpl
 import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil
@@ -306,10 +306,10 @@ internal object IDELightClassContexts {
 
         val moduleInfo = files.first().getModuleInfo()
         val container = createContainer("LightClassStub", JvmPlatformCompilerServices) {
-            val jvmTarget = IDELanguageSettingsProvider.getTargetPlatform(moduleInfo, project) as? JvmTarget
+            val jvmTarget = IDELanguageSettingsProvider.getTargetPlatform(moduleInfo, project) as? JvmTarget ?: JvmTarget.DEFAULT
             configureModule(
-                ModuleContext(moduleDescriptor, project), JvmPlatform,
-                jvmTarget ?: JvmTarget.DEFAULT, JvmPlatformCompilerServices, trace
+                ModuleContext(moduleDescriptor, project), JvmPlatforms.jvmPlatformByTargetVersion(jvmTarget),
+                JvmPlatformCompilerServices, trace
             )
 
             useInstance(GlobalSearchScope.EMPTY_SCOPE)

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/IdeaModuleInfos.kt

@@ -45,8 +45,7 @@ import org.jetbrains.kotlin.idea.util.rootManager
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.platform.idePlatformKind
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.utils.addIfNotNull
 import java.util.*
 

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/LibraryDependenciesCache.kt

@@ -17,11 +17,11 @@ import com.intellij.psi.util.CachedValueProvider
 import com.intellij.psi.util.CachedValuesManager
 import com.intellij.util.containers.ContainerUtil
 import com.intellij.util.containers.MultiMap
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.idea.core.util.CachedValue
 import org.jetbrains.kotlin.idea.core.util.getValue
 import org.jetbrains.kotlin.idea.framework.getLibraryPlatform
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.isCommon
 import org.jetbrains.kotlin.utils.addIfNotNull
 import java.util.*
 
@@ -92,7 +92,7 @@ class LibraryDependenciesCacheImpl(private val project: Project) : LibraryDepend
      * @return true if it's OK to add a dependency from a library with platform [from] to a library with platform [to]
      */
     private fun compatiblePlatforms(from: TargetPlatform, to: TargetPlatform): Boolean {
-        return from == to || to is CommonPlatform
+        return from == to || to.isCommon()
     }
 
     private fun getLibraryUsageIndex(): LibraryUsageIndex {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/ScriptModuleInfos.kt

@@ -15,7 +15,7 @@ import org.jetbrains.kotlin.idea.stubindex.KotlinSourceFilterScope
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.scripting.definitions.KotlinScriptDefinition
 import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 
 data class ScriptModuleInfo(
     val project: Project,

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/moduleInfosFromIdeaModel.kt

@@ -15,8 +15,8 @@ import com.intellij.openapi.roots.LibraryOrderEntry
 import com.intellij.openapi.roots.ModuleRootManager
 import com.intellij.openapi.roots.ProjectRootModificationTracker
 import com.intellij.psi.util.CachedValueProvider
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.isCommon
 import java.util.concurrent.ConcurrentHashMap
 
 fun getModuleInfosFromIdeaModel(project: Project, platform: TargetPlatform): List<IdeaModuleInfo> {
@@ -70,7 +70,7 @@ private fun mergePlatformModules(
     allModules: List<ModuleSourceInfo>,
     platform: TargetPlatform
 ): List<IdeaModuleInfo> {
-    if (platform is CommonPlatform) return allModules
+    if (platform.isCommon()) return allModules
 
     val platformModules =
         allModules.flatMap { module ->

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/multiplatformUtil.kt

@@ -14,7 +14,6 @@ import com.intellij.openapi.roots.ProjectRootModificationTracker
 import com.intellij.psi.PsiElement
 import com.intellij.psi.util.CachedValueProvider
 import org.jetbrains.kotlin.analyzer.ModuleInfo
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.caches.resolve.KotlinCacheService
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.idea.caches.project.SourceType.PRODUCTION
@@ -26,7 +25,8 @@ import org.jetbrains.kotlin.idea.project.platform
 import org.jetbrains.kotlin.idea.util.rootManager
 import org.jetbrains.kotlin.platform.impl.CommonIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.isCommon
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.isCommon
 
 val Module.isNewMPPModule: Boolean
     get() = facetSettings?.kind?.isNewMPP ?: false
@@ -119,15 +119,16 @@ private fun ModuleSourceInfo.toDescriptor() = KotlinCacheService.getInstance(mod
     .getResolutionFacadeByModuleInfo(this, platform)?.moduleDescriptor
 
 fun PsiElement.getPlatformModuleInfo(desiredPlatform: TargetPlatform): PlatformModuleInfo? {
-    assert(desiredPlatform !is CommonPlatform) { "Platform module cannot have Common platform" }
+    assert(!desiredPlatform.isCommon()) { "Platform module cannot have Common platform" }
     val moduleInfo = getNullableModuleInfo() as? ModuleSourceInfo ?: return null
-    return when (moduleInfo.platform) {
-        is CommonPlatform -> {
+    val platform = moduleInfo.platform
+    return when {
+        platform.isCommon() -> {
             val correspondingImplementingModule = moduleInfo.module.implementingModules.map { it.toInfo(moduleInfo.sourceType) }
                 .firstOrNull { it?.platform == desiredPlatform } ?: return null
             PlatformModuleInfo(correspondingImplementingModule, correspondingImplementingModule.expectedBy)
         }
-        desiredPlatform -> {
+        platform == desiredPlatform -> {
             val expectedBy = moduleInfo.expectedBy.takeIf { it.isNotEmpty() } ?: return null
             PlatformModuleInfo(moduleInfo, expectedBy)
         }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IDEKotlinAsJavaSupport.kt

@@ -29,7 +29,8 @@ import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
 import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.*
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.utils.sure
 import java.util.*
@@ -240,7 +241,7 @@ class IDEKotlinAsJavaSupport(private val project: Project) : KotlinAsJavaSupport
     // thus we need to ensure that resolver will be built by the file from platform part of the module
     // (resolver built by a file from the common part will have no knowledge of the platform part)
     // the actual of order of files that resolver receives is controlled by *findFilesForFacade* method
-    private fun Collection<KtFile>.platformSourcesFirst() = sortedByDescending { it.platform == JvmPlatform }
+    private fun Collection<KtFile>.platformSourcesFirst() = sortedByDescending { it.platform.isJvm() }
 
     private fun getLightClassForDecompiledClassOrObject(decompiledClassOrObject: KtClassOrObject): KtLightClassForDecompiledDeclaration? {
         if (decompiledClassOrObject is KtEnumEntry) {
@@ -331,5 +332,5 @@ class IDEKotlinAsJavaSupport(private val project: Project) : KotlinAsJavaSupport
 }
 
 internal fun PsiElement.getModuleInfoPreferringJvmPlatform(): IdeaModuleInfo {
-    return getPlatformModuleInfo(JvmPlatform) ?: getModuleInfo()
+    return getPlatformModuleInfo(JvmPlatforms.defaultJvmPlatform) ?: getModuleInfo()
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KotlinCacheServiceImpl.kt

@@ -54,7 +54,7 @@ import org.jetbrains.kotlin.platform.DefaultIdeTargetPlatformKindProvider
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.contains
 import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.diagnostics.KotlinSuppressCache
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.utils.addToStdlib.firstIsInstanceOrNull

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/KtFileClassProviderImpl.kt

@@ -18,7 +18,7 @@ import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.KtFileClassProvider
 import org.jetbrains.kotlin.psi.analysisContext
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.isJvm
 
 class KtFileClassProviderImpl(val kotlinAsJavaSupport: KotlinAsJavaSupport) :
     KtFileClassProvider {
@@ -40,7 +40,7 @@ class KtFileClassProviderImpl(val kotlinAsJavaSupport: KotlinAsJavaSupport) :
         // common files might be in fact compiled to jvm and thus correspond to a PsiClass
         // this API does not provide context (like GSS) to be able to determine if this file is in fact seen through a jvm module
         // this also fixes a problem where a Java JUnit run configuration producer would produce run configurations for a common file
-        if (moduleInfo.platform !is JvmPlatform) return emptyArray()
+        if (!moduleInfo.platform.isJvm()) return emptyArray()
 
         val jvmClassInfo = JvmFileClassUtil.getFileClassInfoNoResolve(file)
         val fileClassFqName = file.javaFileFacadeFqName

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/PerFileAnalysisCache.kt

@@ -23,7 +23,6 @@ import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.analyzer.AnalysisResult
-import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.container.ComponentProvider
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.context.GlobalContext
@@ -33,14 +32,12 @@ import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.diagnostics.DiagnosticUtils
 import org.jetbrains.kotlin.frontend.di.createContainerForLazyBodyResolve
 import org.jetbrains.kotlin.idea.caches.project.getModuleInfo
-import org.jetbrains.kotlin.idea.compiler.IDELanguageSettingsProvider
 import org.jetbrains.kotlin.idea.project.TargetPlatformDetector
 import org.jetbrains.kotlin.idea.project.findCompilerServices
 import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.parentsWithSelf
 import org.jetbrains.kotlin.resolve.*
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.resolve.lazy.ResolveSession
 import java.util.*
@@ -190,10 +187,8 @@ private object KotlinResolveDataProvider {
 
             val moduleInfo = analyzableElement.containingKtFile.getModuleInfo()
 
+            // TODO: should return proper platform!
             val targetPlatform = moduleInfo.platform ?: TargetPlatformDetector.getPlatform(analyzableElement.containingKtFile)
-            val targetPlatformVersion = IDELanguageSettingsProvider.getTargetPlatform(moduleInfo, project).let {
-                if (targetPlatform == JvmPlatform && it !is JvmTarget) JvmTarget.DEFAULT else it
-            }
 
             val lazyTopDownAnalyzer = createContainerForLazyBodyResolve(
                 //TODO: should get ModuleContext
@@ -202,7 +197,6 @@ private object KotlinResolveDataProvider {
                 trace,
                 targetPlatform,
                 bodyResolveCache,
-                targetPlatformVersion,
                 targetPlatform.findCompilerServices,
                 analyzableElement.languageVersionSettings
             ).get<LazyTopDownAnalyzer>()

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/ProjectResolutionFacade.kt

@@ -25,7 +25,6 @@ import com.intellij.psi.util.PsiModificationTracker
 import com.intellij.util.containers.SLRUCache
 import org.jetbrains.kotlin.analyzer.*
 import org.jetbrains.kotlin.analyzer.common.CommonAnalysisParameters
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.builtins.jvm.JvmBuiltIns
 import org.jetbrains.kotlin.caches.resolve.resolution
@@ -41,11 +40,13 @@ import org.jetbrains.kotlin.idea.project.IdeaEnvironment
 import org.jetbrains.kotlin.load.java.structure.JavaClass
 import org.jetbrains.kotlin.load.java.structure.impl.JavaClassImpl
 import org.jetbrains.kotlin.platform.idePlatformKind
+import org.jetbrains.kotlin.platform.isCommon
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.CompositeBindingContext
 import org.jetbrains.kotlin.resolve.jvm.JvmPlatformParameters
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
 
 internal class ProjectResolutionFacade(
@@ -125,7 +126,7 @@ internal class ProjectResolutionFacade(
             packagePartProviderFactory = { IDEPackagePartProvider(it.moduleContentScope) },
             moduleByJavaClass = { javaClass: JavaClass ->
                 val psiClass = (javaClass as JavaClassImpl).psi
-                psiClass.getPlatformModuleInfo(JvmPlatform)?.platformModule ?: psiClass.getNullableModuleInfo()
+                psiClass.getPlatformModuleInfo(JvmPlatforms.defaultJvmPlatform)?.platformModule ?: psiClass.getNullableModuleInfo()
             }
         )
 
@@ -144,9 +145,9 @@ internal class ProjectResolutionFacade(
                 platform.idePlatformKind.resolution.resolverForModuleFactory
             },
             platformParameters = { platform ->
-                when (platform) {
-                    is JvmPlatform -> jvmPlatformParameters
-                    is CommonPlatform -> commonPlatformParameters
+                when {
+                    platform.isJvm() -> jvmPlatformParameters
+                    platform.isCommon() -> commonPlatformParameters
                     else -> PlatformAnalysisParameters.Empty
                 }
             },

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/ResolutionFacadeWithDebugInfo.kt

@@ -23,7 +23,7 @@ import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
 

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/packageOracles.kt

@@ -28,14 +28,14 @@ import org.jetbrains.kotlin.idea.caches.project.projectSourceModules
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.isSubpackageOf
 import org.jetbrains.kotlin.resolve.jvm.KotlinJavaPsiFacade
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.isJvm
 
 class IdePackageOracleFactory(val project: Project) : PackageOracleFactory {
     override fun createOracle(moduleInfo: ModuleInfo): PackageOracle {
         if (moduleInfo !is IdeaModuleInfo) return PackageOracle.Optimistic
 
-        return when (moduleInfo.platform) {
-            JvmPlatform -> when (moduleInfo.moduleOrigin) {
+        return when {
+            moduleInfo.platform.isJvm() -> when (moduleInfo.moduleOrigin) {
                 ModuleOrigin.LIBRARY -> JavaPackagesOracle(moduleInfo, project)
                 ModuleOrigin.MODULE -> JvmSourceOracle(moduleInfo, project)
                 ModuleOrigin.OTHER -> PackageOracle.Optimistic

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/util/JavaResolveExtension.kt

@@ -34,8 +34,8 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.psiUtil.parameterIndex
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.resolve.jvm.JavaDescriptorResolver
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
 
 fun PsiMethod.getJavaMethodDescriptor(): FunctionDescriptor? = javaResolutionFacade()?.let { getJavaMethodDescriptor(it) }
@@ -154,7 +154,7 @@ fun PsiElement.hasJavaResolutionFacade(): Boolean = this.originalElement.contain
 fun PsiElement.javaResolutionFacade() =
     KotlinCacheService.getInstance(project).getResolutionFacadeByFile(
         this.originalElement.containingFile ?: reportCouldNotCreateJavaFacade(),
-        JvmPlatform
+        JvmPlatforms.defaultJvmPlatform
     )
 
 private fun PsiElement.reportCouldNotCreateJavaFacade(): Nothing =

idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/IDELanguageSettingsProvider.kt

@@ -32,7 +32,7 @@ import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.KotlinFacetSettingsProvider
 import org.jetbrains.kotlin.config.LanguageVersionSettings
-import org.jetbrains.kotlin.config.TargetPlatformVersion
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.idea.caches.project.*
 import org.jetbrains.kotlin.idea.project.getLanguageVersionSettings
 import org.jetbrains.kotlin.idea.project.languageVersionSettings
@@ -72,6 +72,7 @@ object IDELanguageSettingsProvider : LanguageSettingsProvider {
         return result
     }
 
+    // TODO(dsavvinov): get rid of this method; instead store proper instance of TargetPlatformVersion in platform-instance
     override fun getTargetPlatform(moduleInfo: ModuleInfo, project: Project): TargetPlatformVersion =
         when (moduleInfo) {
             is ModuleSourceInfo -> moduleInfo.module.platform?.version ?: TargetPlatformVersion.NoVersion

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/builtIns/KotlinBuiltInDecompiler.kt

@@ -19,7 +19,6 @@ package org.jetbrains.kotlin.idea.decompiler.builtIns
 import com.intellij.ide.highlighter.JavaClassFileType
 import com.intellij.openapi.vfs.VirtualFile
 import org.jetbrains.annotations.TestOnly
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.idea.decompiler.common.FileWithMetadata
 import org.jetbrains.kotlin.idea.decompiler.common.KotlinMetadataDecompiler
 import org.jetbrains.kotlin.metadata.ProtoBuf

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/classFile/DeserializerForClassfileDecompiler.kt

@@ -35,8 +35,6 @@ import org.jetbrains.kotlin.load.kotlin.KotlinClassFinder.Result.KotlinClass
 import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmProtoBufUtil
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
 import org.jetbrains.kotlin.serialization.deserialization.ClassData
 import org.jetbrains.kotlin.serialization.deserialization.ClassDataFinder
 import org.jetbrains.kotlin.serialization.deserialization.DeserializationComponents

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/common/KotlinMetadataDeserializerForDecompiler.kt

@@ -29,7 +29,6 @@ import org.jetbrains.kotlin.metadata.ProtoBuf
 import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
 import org.jetbrains.kotlin.metadata.deserialization.NameResolver
 import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.serialization.SerializerExtensionProtocol
 import org.jetbrains.kotlin.serialization.deserialization.*
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedPackageMemberScope

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/js/KotlinJavaScriptMetaFileDecompiler.kt

@@ -19,7 +19,6 @@ package org.jetbrains.kotlin.idea.decompiler.js
 import com.intellij.openapi.vfs.VirtualFile
 import org.jetbrains.kotlin.idea.decompiler.common.FileWithMetadata
 import org.jetbrains.kotlin.idea.decompiler.common.KotlinMetadataDecompiler
-import org.jetbrains.kotlin.js.resolve.JsPlatform
 import org.jetbrains.kotlin.metadata.ProtoBuf
 import org.jetbrains.kotlin.metadata.js.JsProtoBuf
 import org.jetbrains.kotlin.psi.stubs.KotlinStubVersions

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.kt

@@ -18,7 +18,6 @@ import com.intellij.psi.stubs.StringStubIndexExtension
 import com.intellij.util.containers.ContainerUtil
 import gnu.trove.THashSet
 import org.jetbrains.annotations.TestOnly
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
 import org.jetbrains.kotlin.idea.caches.project.BinaryModuleInfo
 import org.jetbrains.kotlin.idea.caches.project.getBinaryLibrariesModuleInfos
@@ -35,6 +34,7 @@ import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.debugText.getDebugText
+import org.jetbrains.kotlin.platform.isCommon
 import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
 
 object SourceNavigationHelper {
@@ -75,10 +75,10 @@ object SourceNavigationHelper {
 
     private fun BinaryModuleInfo.associatedCommonLibraries(): List<BinaryModuleInfo> {
         val platform = platform
-        if (platform == null || platform is CommonPlatform) return emptyList()
+        if (platform == null || platform.isCommon()) return emptyList()
 
         return dependencies().filterIsInstance<BinaryModuleInfo>().filter {
-            it.platform is CommonPlatform
+            it.platform.isCommon()
         }
     }
 

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/textBuilder/DeserializerForDecompilerBase.kt

@@ -24,7 +24,6 @@ import org.jetbrains.kotlin.descriptors.impl.MutablePackageFragmentDescriptor
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.serialization.deserialization.DeserializationComponents
 import org.jetbrains.kotlin.serialization.deserialization.LocalClassifierTypeSettings
 import org.jetbrains.kotlin.storage.LockBasedStorageManager

idea/idea-analysis/src/org/jetbrains/kotlin/idea/framework/LibraryKinds.kt

@@ -24,15 +24,14 @@ import com.intellij.openapi.roots.libraries.Library
 import com.intellij.openapi.roots.libraries.PersistentLibraryKind
 import com.intellij.openapi.util.io.JarUtil
 import com.intellij.openapi.vfs.*
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.caches.resolve.IdePlatformKindResolution
 import org.jetbrains.kotlin.caches.resolve.resolution
 import org.jetbrains.kotlin.idea.vfilefinder.KnownLibraryKindForIndex
 import org.jetbrains.kotlin.idea.vfilefinder.getLibraryKindForJar
-import org.jetbrains.kotlin.js.resolve.JsPlatform
+import org.jetbrains.kotlin.platform.CommonPlatforms
 import org.jetbrains.kotlin.platform.DefaultIdeTargetPlatformKindProvider
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.js.JsPlatforms
 import org.jetbrains.kotlin.utils.PathUtil
 import java.util.jar.Attributes
 import java.util.regex.Pattern
@@ -43,14 +42,14 @@ interface KotlinLibraryKind {
 
 object JSLibraryKind : PersistentLibraryKind<DummyLibraryProperties>("kotlin.js"), KotlinLibraryKind {
     override val compilerPlatform: TargetPlatform
-        get() = JsPlatform
+        get() = JsPlatforms.defaultJsPlatform
 
     override fun createDefaultProperties() = DummyLibraryProperties.INSTANCE!!
 }
 
 object CommonLibraryKind : PersistentLibraryKind<DummyLibraryProperties>("kotlin.common"), KotlinLibraryKind {
     override val compilerPlatform: TargetPlatform
-        get() = CommonPlatform
+        get() = CommonPlatforms.defaultCommonPlatform
 
     override fun createDefaultProperties() = DummyLibraryProperties.INSTANCE!!
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/DuplicateJvmSignatureAnnotator.kt

@@ -26,7 +26,7 @@ import org.jetbrains.kotlin.idea.project.TargetPlatformDetector
 import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.isJvm
 
 class DuplicateJvmSignatureAnnotator : Annotator {
     override fun annotate(element: PsiElement, holder: AnnotationHolder) {
@@ -34,7 +34,7 @@ class DuplicateJvmSignatureAnnotator : Annotator {
         if (!ProjectRootsUtil.isInProjectSource(element)) return
 
         val file = element.containingFile
-        if (file !is KtFile || TargetPlatformDetector.getPlatform(file) !== JvmPlatform) return
+        if (file !is KtFile || !TargetPlatformDetector.getPlatform(file).isJvm()) return
 
         val otherDiagnostics = when (element) {
             is KtDeclaration -> element.analyzeWithContent()

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/Platform.kt

@@ -49,7 +49,8 @@ import org.jetbrains.kotlin.platform.impl.isCommon
 import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.UserDataProperty
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.config.JvmTarget
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.utils.Jsr305State
 import java.io.File
 
@@ -212,6 +213,7 @@ private fun Module.computeLanguageVersionSettings(): LanguageVersionSettings {
 val Module.platform: IdePlatform<*, *>?
     get() = KotlinFacetSettingsProvider.getInstance(project).getInitializedSettings(this).platform ?: project.platform
 
+// FIXME(dsavvinov): this logic is clearly wrong in MPP environment; review and fix
 val Project.platform: IdePlatform<*, *>?
     get() {
         val jvmTarget = Kotlin2JvmCompilerArgumentsHolder.getInstance(this).settings.jvmTarget ?: return null
@@ -265,12 +267,4 @@ val PsiElement.languageVersionSettings: LanguageVersionSettings
             return LanguageVersionSettingsImpl.DEFAULT
         }
         return IDELanguageSettingsProvider.getLanguageVersionSettings(this.getModuleInfo(), project)
-    }
-
-val KtElement.jvmTarget: JvmTarget
-    get() {
-        if (ServiceManager.getService(project, ProjectFileIndex::class.java) == null) {
-            return JvmTarget.DEFAULT
-        }
-        return IDELanguageSettingsProvider.getTargetPlatform(this.getModuleInfo(), project) as? JvmTarget ?: JvmTarget.DEFAULT
-    }
+    }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/ProjectStructureUtil.java

@@ -25,7 +25,7 @@ import com.intellij.psi.util.CachedValuesManager;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.platform.IdePlatform;
 import org.jetbrains.kotlin.platform.IdePlatformKindUtil;
-import org.jetbrains.kotlin.resolve.TargetPlatform;
+import org.jetbrains.kotlin.platform.TargetPlatform;
 
 public class ProjectStructureUtil {
     private static final Key<CachedValue<TargetPlatform>> PLATFORM_FOR_MODULE = Key.create("PLATFORM_FOR_MODULE");

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/ResolveElementCache.kt

@@ -22,6 +22,7 @@ import com.intellij.psi.util.CachedValueProvider
 import com.intellij.psi.util.CachedValuesManager
 import com.intellij.psi.util.PsiModificationTracker
 import com.intellij.util.containers.ContainerUtil
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.cfg.ControlFlowInformationProvider
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.context.SimpleGlobalContext
@@ -717,7 +718,6 @@ class ResolveElementCache(
             trace,
             targetPlatform,
             statementFilter,
-            file.jvmTarget,
             targetPlatform.findCompilerServices,
             file.languageVersionSettings
         ).get()

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/TargetPlatformDetector.java

@@ -22,15 +22,17 @@ import com.intellij.openapi.roots.ProjectFileIndex;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFile;
+import kotlin.collections.CollectionsKt;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.platform.DefaultIdeTargetPlatformKindProvider;
 import org.jetbrains.kotlin.platform.IdePlatform;
 import org.jetbrains.kotlin.platform.IdePlatformKind;
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms;
 import org.jetbrains.kotlin.psi.KtCodeFragment;
 import org.jetbrains.kotlin.psi.KtFile;
 import org.jetbrains.kotlin.psi.KtPsiFactoryKt;
-import org.jetbrains.kotlin.resolve.TargetPlatform;
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform;
+import org.jetbrains.kotlin.platform.TargetPlatform;
+import org.jetbrains.kotlin.platform.SimplePlatform;
 import org.jetbrains.kotlin.scripting.definitions.DefinitionsKt;
 import org.jetbrains.kotlin.scripting.definitions.KotlinScriptDefinition;
 
@@ -56,7 +58,8 @@ public class TargetPlatformDetector {
         PsiElement context = KtPsiFactoryKt.getAnalysisContext(file);
         if (context != null) {
             PsiFile contextFile = context.getContainingFile();
-            return contextFile instanceof KtFile ? getPlatform((KtFile) contextFile) : JvmPlatform.INSTANCE;
+            // TODO(dsavvinov): Get default platform with proper target
+            return contextFile instanceof KtFile ? getPlatform((KtFile) contextFile) : JvmPlatforms.INSTANCE.getDefaultJvmPlatform();
         }
 
         if (file.isScript()) {
@@ -65,7 +68,9 @@ public class TargetPlatformDetector {
                 String platformNameFromScriptDefinition = scriptDefinition.getPlatform();
                 for (IdePlatform platform : IdePlatformKind.Companion.getAll_PLATFORMS()) {
                     TargetPlatform compilerPlatform = platform.getKind().getCompilerPlatform();
-                    if (compilerPlatform.getPlatformName().equals(platformNameFromScriptDefinition)) {
+                    // FIXME(dsavvinov): get rid of matching by name
+                    SimplePlatform simplePlatform = CollectionsKt.single(compilerPlatform);
+                    if (simplePlatform.getPlatformName().equals(platformNameFromScriptDefinition)) {
                         return compilerPlatform;
                     }
                 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/compilerServices.kt

@@ -5,24 +5,24 @@
 
 package org.jetbrains.kotlin.idea.project
 
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.analyzer.common.CommonPlatformCompilerServices
-import org.jetbrains.kotlin.js.resolve.JsPlatform
 import org.jetbrains.kotlin.js.resolve.JsPlatformCompilerServices
-import org.jetbrains.kotlin.resolve.PlatformDependentCompilerServices
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.isCommon
+import org.jetbrains.kotlin.platform.js.isJs
+import org.jetbrains.kotlin.platform.jvm.isJvm
+import org.jetbrains.kotlin.platform.konan.isNative
+import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformCompilerServices
-import org.jetbrains.kotlin.resolve.konan.platform.KonanPlatform
 import org.jetbrains.kotlin.resolve.konan.platform.NativePlatformCompilerServices
 import java.lang.IllegalStateException
 
 val TargetPlatform.findCompilerServices: PlatformDependentCompilerServices
     get() =
-        when (this) {
-            is JvmPlatform -> JvmPlatformCompilerServices
-            is JsPlatform -> JsPlatformCompilerServices
-            is KonanPlatform -> NativePlatformCompilerServices
-            is CommonPlatform -> CommonPlatformCompilerServices
+        when {
+            isJvm() -> JvmPlatformCompilerServices
+            isJs() -> JsPlatformCompilerServices
+            isNative() -> NativePlatformCompilerServices
+            isCommon() -> CommonPlatformCompilerServices
             else -> throw IllegalStateException("Unknown platform $this")
         }

idea/idea-android/src/org/jetbrains/kotlin/android/configure/KotlinAndroidGradleModuleConfigurator.kt

@@ -17,14 +17,14 @@ import org.jetbrains.kotlin.idea.configuration.getBuildSystemType
 import org.jetbrains.kotlin.idea.util.projectStructure.version
 import org.jetbrains.kotlin.idea.versions.MAVEN_STDLIB_ID_JDK7
 import org.jetbrains.kotlin.idea.versions.hasJreSpecificRuntime
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.TargetPlatform
 
 class KotlinAndroidGradleModuleConfigurator internal constructor() : KotlinWithGradleConfigurator() {
 
     override val name: String = NAME
 
-    override val targetPlatform: TargetPlatform = JvmPlatform
+    override val targetPlatform: TargetPlatform = JvmPlatforms.defaultJvmPlatform
 
     override val presentableText: String = "Android with Gradle"
 

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/AllClassesCompletion.kt

@@ -33,7 +33,7 @@ import org.jetbrains.kotlin.idea.resolve.ResolutionFacade
 import org.jetbrains.kotlin.load.java.JvmAnnotationNames
 import org.jetbrains.kotlin.load.kotlin.header.KotlinClassHeader
 import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
 import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.resolve.scopes.getDescriptorsFiltered
@@ -68,7 +68,7 @@ class AllClassesCompletion(private val parameters: CompletionParameters,
                     .forEach { classifierDescriptorCollector(it) }
         }
 
-        if (TargetPlatformDetector.getPlatform(parameters.originalFile as KtFile) == JvmPlatform) {
+        if (TargetPlatformDetector.getPlatform(parameters.originalFile as KtFile).isJvm()) {
             addAdaptedJavaCompletion(javaClassCollector)
         }
     }

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/BasicCompletionSession.kt

@@ -60,7 +60,7 @@ import org.jetbrains.kotlin.psi.psiUtil.*
 import org.jetbrains.kotlin.renderer.render
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.descriptorUtil.*
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindExclude
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
@@ -270,7 +270,7 @@ class BasicCompletionSession(
                 val packageNames = PackageIndexUtil.getSubPackageFqNames(FqName.ROOT, searchScope, project, prefixMatcher.asNameFilter())
                     .toMutableSet()
 
-                if (TargetPlatformDetector.getPlatform(parameters.originalFile as KtFile) == JvmPlatform) {
+                if (TargetPlatformDetector.getPlatform(parameters.originalFile as KtFile).isJvm()) {
                     JavaPsiFacade.getInstance(project).findPackage("")?.getSubPackages(searchScope)?.forEach { psiPackage ->
                         val name = psiPackage.name
                         if (Name.isValidIdentifier(name!!)) {

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt

@@ -28,7 +28,6 @@ import com.intellij.patterns.PatternCondition
 import com.intellij.patterns.StandardPatterns
 import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.util.ProcessingContext
-import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.idea.caches.project.ModuleOrigin
 import org.jetbrains.kotlin.idea.caches.project.OriginCapability
@@ -38,15 +37,13 @@ import org.jetbrains.kotlin.idea.codeInsight.ReferenceVariantsHelper
 import org.jetbrains.kotlin.idea.core.*
 import org.jetbrains.kotlin.idea.imports.importableFqName
 import org.jetbrains.kotlin.idea.project.TargetPlatformDetector
-import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.idea.references.mainReference
 import org.jetbrains.kotlin.idea.util.*
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingContext
-import org.jetbrains.kotlin.resolve.MultiTargetPlatform
 import org.jetbrains.kotlin.resolve.descriptorUtil.module
-import org.jetbrains.kotlin.resolve.getMultiTargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.isCommon
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
 import org.jetbrains.kotlin.resolve.scopes.receivers.ExpressionReceiver
 import org.jetbrains.kotlin.types.TypeUtils
@@ -88,7 +85,7 @@ abstract class CompletionSession(
     protected val resolutionFacade = file.getResolutionFacade()
     protected val moduleDescriptor = resolutionFacade.moduleDescriptor
     protected val project = position.project
-    protected val isJvmModule = TargetPlatformDetector.getPlatform(parameters.originalFile as KtFile) == JvmPlatform
+    protected val isJvmModule = TargetPlatformDetector.getPlatform(parameters.originalFile as KtFile).isJvm()
     protected val isDebuggerContext = file is KtCodeFragment
 
     protected val nameExpression: KtSimpleNameExpression?
@@ -149,7 +146,7 @@ abstract class CompletionSession(
             { CompletionBenchmarkSink.instance.onFlush(this) },
             prefixMatcher, parameters, resultSet,
             createSorter(), (file as? KtCodeFragment)?.extraCompletionFilter,
-            moduleDescriptor.getMultiTargetPlatform() === MultiTargetPlatform.Common
+            moduleDescriptor.platform.isCommon()
         )
     }
 

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractCompiledKotlinInJavaCompletionTest.kt

@@ -7,10 +7,10 @@ package org.jetbrains.kotlin.idea.completion.test
 
 import com.intellij.codeInsight.completion.CompletionType
 import org.jetbrains.kotlin.idea.test.SdkAndMockLibraryProjectDescriptor
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 abstract class AbstractCompiledKotlinInJavaCompletionTest : KotlinFixtureCompletionBaseTestCase() {
-    override fun getPlatform() = JvmPlatform
+    override fun getPlatform() = JvmPlatforms.defaultJvmPlatform
 
     override fun getProjectDescriptor() =
         SdkAndMockLibraryProjectDescriptor(COMPLETION_TEST_DATA_BASE_PATH + "/injava/mockLib", false)

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractCompletionIncrementalResolveTest.kt

@@ -12,7 +12,7 @@ import org.jetbrains.kotlin.idea.completion.CompletionBindingContextProvider
 import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
 import org.jetbrains.kotlin.idea.test.KotlinWithJdkAndRuntimeLightProjectDescriptor
 import org.jetbrains.kotlin.idea.util.application.executeWriteCommand
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.test.InTextDirectivesUtils
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import java.io.File
@@ -82,7 +82,7 @@ abstract class AbstractCompletionIncrementalResolveTest : KotlinLightCodeInsight
             }
 
             testCompletion(FileUtil.loadFile(file, true),
-                           JvmPlatform,
+                           JvmPlatforms.defaultJvmPlatform,
                            { completionType, count -> myFixture.complete(completionType, count) },
                            additionalValidDirectives = listOf(TYPE_DIRECTIVE_PREFIX, BACKSPACES_DIRECTIVE_PREFIX))
 

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractJSBasicCompletionTest.java

@@ -9,8 +9,8 @@ import com.intellij.codeInsight.completion.CompletionType;
 import com.intellij.testFramework.LightProjectDescriptor;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.idea.test.KotlinStdJSProjectDescriptor;
-import org.jetbrains.kotlin.js.resolve.JsPlatform;
-import org.jetbrains.kotlin.resolve.TargetPlatform;
+import org.jetbrains.kotlin.platform.TargetPlatform;
+import org.jetbrains.kotlin.platform.js.JsPlatforms;
 
 public abstract class AbstractJSBasicCompletionTest extends KotlinFixtureCompletionBaseTestCase {
     @NotNull
@@ -22,7 +22,7 @@ public abstract class AbstractJSBasicCompletionTest extends KotlinFixtureComplet
     @NotNull
     @Override
     public TargetPlatform getPlatform() {
-        return JsPlatform.INSTANCE;
+        return JsPlatforms.INSTANCE.getDefaultJsPlatform();
     }
 
     @NotNull

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractJvmBasicCompletionTest.java

@@ -9,8 +9,8 @@ import com.intellij.codeInsight.completion.CompletionType;
 import com.intellij.testFramework.LightProjectDescriptor;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.idea.test.KotlinWithJdkAndRuntimeLightProjectDescriptor;
-import org.jetbrains.kotlin.resolve.TargetPlatform;
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform;
+import org.jetbrains.kotlin.platform.TargetPlatform;
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms;
 
 public abstract class AbstractJvmBasicCompletionTest extends KotlinFixtureCompletionBaseTestCase {
     @NotNull
@@ -22,7 +22,7 @@ public abstract class AbstractJvmBasicCompletionTest extends KotlinFixtureComple
     @NotNull
     @Override
     public TargetPlatform getPlatform() {
-        return JvmPlatform.INSTANCE;
+        return JvmPlatforms.INSTANCE.getDefaultJvmPlatform();
     }
 
     @NotNull

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractJvmSmartCompletionTest.java

@@ -9,8 +9,8 @@ import com.intellij.codeInsight.completion.CompletionType;
 import com.intellij.testFramework.LightProjectDescriptor;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.idea.test.KotlinWithJdkAndRuntimeLightProjectDescriptor;
-import org.jetbrains.kotlin.resolve.TargetPlatform;
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform;
+import org.jetbrains.kotlin.platform.TargetPlatform;
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms;
 
 public abstract class AbstractJvmSmartCompletionTest extends KotlinFixtureCompletionBaseTestCase {
     @NotNull
@@ -22,7 +22,7 @@ public abstract class AbstractJvmSmartCompletionTest extends KotlinFixtureComple
     @NotNull
     @Override
     public TargetPlatform getPlatform() {
-        return JvmPlatform.INSTANCE;
+        return JvmPlatforms.INSTANCE.getDefaultJvmPlatform();
     }
 
     @NotNull

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractJvmWithLibBasicCompletionTest.kt

@@ -9,7 +9,7 @@ import com.intellij.codeInsight.completion.CompletionType
 import com.intellij.testFramework.LightProjectDescriptor
 import org.jetbrains.kotlin.idea.test.SdkAndMockLibraryProjectDescriptor
 import org.jetbrains.kotlin.idea.test.PluginTestCaseBase
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 abstract class AbstractJvmWithLibBasicCompletionTest : KotlinFixtureCompletionBaseTestCase() {
     private val TEST_PATH = COMPLETION_TEST_DATA_BASE_PATH + "/basic/withLib"
@@ -21,6 +21,6 @@ abstract class AbstractJvmWithLibBasicCompletionTest : KotlinFixtureCompletionBa
         return SdkAndMockLibraryProjectDescriptor(TEST_PATH + "/" + getTestName(false) + "Src", false)
     }
 
-    override fun getPlatform() = JvmPlatform
+    override fun getPlatform() = JvmPlatforms.defaultJvmPlatform
     override fun defaultCompletionType() = CompletionType.BASIC
 }

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractKeywordCompletionTest.kt

@@ -10,10 +10,10 @@ import com.intellij.codeInsight.lookup.LookupElement
 import org.jetbrains.kotlin.idea.completion.KeywordLookupObject
 import org.jetbrains.kotlin.idea.test.KotlinLightProjectDescriptor
 import org.jetbrains.kotlin.idea.test.KotlinProjectDescriptorWithFacet
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 abstract class AbstractKeywordCompletionTest : KotlinFixtureCompletionBaseTestCase() {
-    override fun getPlatform() = JvmPlatform
+    override fun getPlatform() = JvmPlatforms.defaultJvmPlatform
 
     override fun defaultCompletionType() = CompletionType.BASIC
 

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractKotlinSourceInJavaCompletionTest.kt

@@ -7,14 +7,12 @@ package org.jetbrains.kotlin.idea.completion.test
 
 import com.intellij.codeInsight.completion.CompletionType
 import com.intellij.openapi.util.io.FileUtil
-import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase
-import org.apache.commons.io.FileUtils
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import java.io.File
 
 abstract class AbstractKotlinSourceInJavaCompletionTest : KotlinFixtureCompletionBaseTestCase() {
-    override fun getPlatform() = JvmPlatform
+    override fun getPlatform() = JvmPlatforms.defaultJvmPlatform
 
     override fun doTest(testPath: String) {
         val mockPath = RELATIVE_COMPLETION_TEST_DATA_BASE_PATH + "/injava/mockLib"

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractKotlinStdLibInJavaCompletionTest.kt

@@ -7,10 +7,10 @@ package org.jetbrains.kotlin.idea.completion.test
 
 import com.intellij.codeInsight.completion.CompletionType
 import org.jetbrains.kotlin.idea.test.KotlinWithJdkAndRuntimeLightProjectDescriptor
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 abstract class AbstractKotlinStdLibInJavaCompletionTest : KotlinFixtureCompletionBaseTestCase() {
-    override fun getPlatform() = JvmPlatform
+    override fun getPlatform() = JvmPlatforms.defaultJvmPlatform
     override fun getProjectDescriptor() = KotlinWithJdkAndRuntimeLightProjectDescriptor.INSTANCE
     override fun defaultCompletionType() = CompletionType.BASIC
 }

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractMultiFileJvmBasicCompletionTest.kt

@@ -7,14 +7,14 @@ package org.jetbrains.kotlin.idea.completion.test
 
 import com.intellij.codeInsight.completion.CompletionType
 import org.jetbrains.kotlin.idea.test.AstAccessControl
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 abstract class AbstractMultiFileJvmBasicCompletionTest : KotlinCompletionTestCase() {
     protected fun doTest(testPath: String) {
         configureByFile(getTestName(false) + ".kt", "")
         val shouldFail = testPath.contains("NoSpecifiedType")
         AstAccessControl.testWithControlledAccessToAst(shouldFail, getFile().getVirtualFile(), getProject(), getTestRootDisposable(), {
-            testCompletion(file.text, JvmPlatform, { completionType, invocationCount ->
+            testCompletion(file.text, JvmPlatforms.defaultJvmPlatform, { completionType, invocationCount ->
                 setType(completionType)
                 complete(invocationCount)
                 myItems

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/AbstractMultiFileSmartCompletionTest.kt

@@ -7,7 +7,7 @@ package org.jetbrains.kotlin.idea.completion.test
 
 import com.intellij.codeInsight.completion.CompletionType
 import org.jetbrains.kotlin.idea.test.AstAccessControl
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 abstract class AbstractMultiFileSmartCompletionTest : KotlinCompletionTestCase() {
     override fun setUp() {
@@ -18,7 +18,7 @@ abstract class AbstractMultiFileSmartCompletionTest : KotlinCompletionTestCase()
     protected fun doTest(testPath: String) {
         configureByFile(getTestName(false) + ".kt", "")
         AstAccessControl.testWithControlledAccessToAst(false, getFile().getVirtualFile(), getProject(), getTestRootDisposable(), {
-            testCompletion(file.text, JvmPlatform, { completionType, invocationCount ->
+            testCompletion(file.text, JvmPlatforms.defaultJvmPlatform, { completionType, invocationCount ->
                 setType(completionType)
                 complete(invocationCount)
                 myItems

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/CompletionTestUtil.kt

@@ -8,7 +8,7 @@ package org.jetbrains.kotlin.idea.completion.test
 import com.intellij.codeInsight.CodeInsightSettings
 import com.intellij.codeInsight.completion.CompletionType
 import com.intellij.codeInsight.lookup.LookupElement
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.junit.Assert
 
@@ -17,12 +17,12 @@ val RELATIVE_COMPLETION_TEST_DATA_BASE_PATH = "idea/idea-completion/testData"
 val COMPLETION_TEST_DATA_BASE_PATH = KotlinTestUtils.getHomeDirectory() + "/" + RELATIVE_COMPLETION_TEST_DATA_BASE_PATH
 
 fun testCompletion(
-        fileText: String,
-        platform: TargetPlatform?,
-        complete: (CompletionType, Int) -> Array<LookupElement>?,
-        defaultCompletionType: CompletionType = CompletionType.BASIC,
-        defaultInvocationCount: Int = 0,
-        additionalValidDirectives: Collection<String> = emptyList()
+    fileText: String,
+    platform: TargetPlatform?,
+    complete: (CompletionType, Int) -> Array<LookupElement>?,
+    defaultCompletionType: CompletionType = CompletionType.BASIC,
+    defaultInvocationCount: Int = 0,
+    additionalValidDirectives: Collection<String> = emptyList()
 ) {
     testWithAutoCompleteSetting(fileText) {
         val completionType = ExpectedCompletionUtils.getCompletionType(fileText) ?: defaultCompletionType

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/ExpectedCompletionUtils.kt

@@ -19,9 +19,11 @@ import org.jetbrains.kotlin.idea.completion.LookupElementFactory
 import org.jetbrains.kotlin.idea.core.completion.DeclarationLookupObject
 import org.jetbrains.kotlin.idea.test.AstAccessControl
 import org.jetbrains.kotlin.idea.util.module
-import org.jetbrains.kotlin.js.resolve.JsPlatform
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.js.JsPlatforms
+import org.jetbrains.kotlin.platform.js.isJs
+import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.test.InTextDirectivesUtils
 import org.junit.Assert
 import java.util.*
@@ -87,7 +89,7 @@ object ExpectedCompletionUtils {
         }
     }
 
-    private val UNSUPPORTED_PLATFORM_MESSAGE = "Only $JvmPlatform and $JsPlatform platforms are supported"
+    private val UNSUPPORTED_PLATFORM_MESSAGE = "Only ${JvmPlatforms.defaultJvmPlatform} and ${JsPlatforms.defaultJsPlatform} platforms are supported"
 
     private val EXIST_LINE_PREFIX = "EXIST:"
 
@@ -135,19 +137,19 @@ object ExpectedCompletionUtils {
             AstAccessControl.ALLOW_AST_ACCESS_DIRECTIVE)
 
     fun itemsShouldExist(fileText: String, platform: TargetPlatform?): Array<CompletionProposal> {
-        return when (platform) {
-            is JvmPlatform -> processProposalAssertions(fileText, EXIST_LINE_PREFIX, EXIST_JAVA_ONLY_LINE_PREFIX)
-            JsPlatform -> processProposalAssertions(fileText, EXIST_LINE_PREFIX, EXIST_JS_ONLY_LINE_PREFIX)
-            null -> processProposalAssertions(fileText, EXIST_LINE_PREFIX)
+        return when {
+            platform.isJvm() -> processProposalAssertions(fileText, EXIST_LINE_PREFIX, EXIST_JAVA_ONLY_LINE_PREFIX)
+            platform.isJs() -> processProposalAssertions(fileText, EXIST_LINE_PREFIX, EXIST_JS_ONLY_LINE_PREFIX)
+            platform == null -> processProposalAssertions(fileText, EXIST_LINE_PREFIX)
             else -> throw IllegalArgumentException(UNSUPPORTED_PLATFORM_MESSAGE)
         }
     }
 
     fun itemsShouldAbsent(fileText: String, platform: TargetPlatform?): Array<CompletionProposal> {
-        return when (platform) {
-            is JvmPlatform -> processProposalAssertions(fileText, ABSENT_LINE_PREFIX, ABSENT_JAVA_LINE_PREFIX, EXIST_JS_ONLY_LINE_PREFIX)
-            JsPlatform -> processProposalAssertions(fileText, ABSENT_LINE_PREFIX, ABSENT_JS_LINE_PREFIX, EXIST_JAVA_ONLY_LINE_PREFIX)
-            null -> processProposalAssertions(fileText, ABSENT_LINE_PREFIX)
+        return when {
+            platform.isJvm() -> processProposalAssertions(fileText, ABSENT_LINE_PREFIX, ABSENT_JAVA_LINE_PREFIX, EXIST_JS_ONLY_LINE_PREFIX)
+            platform.isJs() -> processProposalAssertions(fileText, ABSENT_LINE_PREFIX, ABSENT_JS_LINE_PREFIX, EXIST_JAVA_ONLY_LINE_PREFIX)
+            platform == null -> processProposalAssertions(fileText, ABSENT_LINE_PREFIX)
             else -> throw IllegalArgumentException(UNSUPPORTED_PLATFORM_MESSAGE)
         }
     }
@@ -179,10 +181,10 @@ object ExpectedCompletionUtils {
     }
 
     fun getExpectedNumber(fileText: String, platform: TargetPlatform?): Int? {
-        return when (platform) {
-            null -> InTextDirectivesUtils.getPrefixedInt(fileText, NUMBER_LINE_PREFIX)
-            is JvmPlatform -> getPlatformExpectedNumber(fileText, NUMBER_JAVA_LINE_PREFIX)
-            JsPlatform -> getPlatformExpectedNumber(fileText, NUMBER_JS_LINE_PREFIX)
+        return when {
+            platform == null -> InTextDirectivesUtils.getPrefixedInt(fileText, NUMBER_LINE_PREFIX)
+            platform.isJvm() -> getPlatformExpectedNumber(fileText, NUMBER_JAVA_LINE_PREFIX)
+            platform.isJs() -> getPlatformExpectedNumber(fileText, NUMBER_JS_LINE_PREFIX)
             else -> throw IllegalArgumentException(UNSUPPORTED_PLATFORM_MESSAGE)
         }
     }

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/KotlinFixtureCompletionBaseTestCase.kt

@@ -13,7 +13,7 @@ import org.jetbrains.kotlin.idea.test.CompilerTestDirectives
 import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
 import org.jetbrains.kotlin.idea.test.configureCompilerOptions
 import org.jetbrains.kotlin.idea.test.rollbackCompilerOptions
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import java.io.File
 
 abstract class KotlinFixtureCompletionBaseTestCase : KotlinLightCodeInsightFixtureTestCase() {

idea/idea-gradle-native/src/org/jetbrains/kotlin/ide/konan/gradle/KotlinNativeGradleConfigurator.kt

@@ -9,7 +9,7 @@ import org.jetbrains.kotlin.ide.konan.hasKotlinNativeRuntimeInScope
 import org.jetbrains.kotlin.idea.configuration.ConfigureKotlinStatus
 import org.jetbrains.kotlin.idea.configuration.KotlinWithGradleConfigurator
 import org.jetbrains.kotlin.idea.configuration.ModuleSourceRootGroup
-import org.jetbrains.kotlin.resolve.konan.platform.KonanPlatform
+import org.jetbrains.kotlin.platform.konan.KonanPlatforms
 
 open class KotlinNativeGradleConfigurator : KotlinWithGradleConfigurator() {
     override fun getKotlinPluginExpression(forKotlinDsl: Boolean): String = ""
@@ -28,7 +28,7 @@ open class KotlinNativeGradleConfigurator : KotlinWithGradleConfigurator() {
 
     override val name: String get() = NAME
 
-    override val targetPlatform get() = KonanPlatform
+    override val targetPlatform get() = KonanPlatforms.defaultKonanPlatform
 
     override val presentableText get() = PRESENTABLE_TEXT
 

idea/idea-gradle-native/tests/org/jetbrains/kotlin/ide/konan/gradle/GradleNativeLibrariesInIDENamingTest.kt

@@ -19,7 +19,7 @@ import org.jetbrains.kotlin.idea.project.platform
 import org.jetbrains.kotlin.idea.util.projectStructure.allModules
 import org.jetbrains.kotlin.konan.library.konanCommonLibraryPath
 import org.jetbrains.kotlin.konan.library.konanPlatformLibraryPath
-import org.jetbrains.kotlin.platform.impl.isKotlinNative
+import org.jetbrains.kotlin.platform.konan.isNative
 import org.jetbrains.plugins.gradle.util.GradleConstants
 import org.junit.Assert.*
 import org.junit.Test
@@ -111,7 +111,7 @@ private fun assertValidModule(module: Module, projectRoot: String) {
         detectLibraryKind(library.getFiles(OrderRootType.CLASSES)) == NativeLibraryKind
     }
 
-    if (module.platform.isKotlinNative) {
+    if (module.platform.isNative()) {
         assertFalse("No Kotlin/Native libraries in $module", nativeLibraries.isEmpty())
         nativeLibraries.forEach { assertValidNativeLibrary(it, projectRoot) }
 

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinGradleModuleConfigurator.kt

@@ -16,14 +16,13 @@
 
 package org.jetbrains.kotlin.idea.configuration
 
-import com.intellij.facet.FacetManager
 import com.intellij.openapi.module.Module
 import com.intellij.openapi.projectRoots.Sdk
 import com.intellij.psi.PsiFile
 import org.jetbrains.kotlin.idea.core.isAndroidModule
 import org.jetbrains.kotlin.idea.versions.getDefaultJvmTarget
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 class KotlinGradleModuleConfigurator : KotlinWithGradleConfigurator() {
 
@@ -31,7 +30,7 @@ class KotlinGradleModuleConfigurator : KotlinWithGradleConfigurator() {
         get() = NAME
 
     override val targetPlatform: TargetPlatform
-        get() = JvmPlatform
+        get() = JvmPlatforms.defaultJvmPlatform
 
     override val presentableText: String
         get() = "Java with Gradle"

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinJsGradleModuleConfigurator.kt

@@ -20,13 +20,13 @@ import com.intellij.openapi.projectRoots.Sdk
 import com.intellij.psi.PsiFile
 import org.jetbrains.kotlin.idea.util.module
 import org.jetbrains.kotlin.idea.versions.MAVEN_JS_STDLIB_ID
-import org.jetbrains.kotlin.js.resolve.JsPlatform
-import org.jetbrains.kotlin.resolve.TargetPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
+import org.jetbrains.kotlin.platform.js.JsPlatforms
 
 class KotlinJsGradleModuleConfigurator : KotlinWithGradleConfigurator() {
     override val name: String = "gradle-js"
     override val presentableText: String = "JavaScript with Gradle"
-    override val targetPlatform: TargetPlatform = JsPlatform
+    override val targetPlatform: TargetPlatform = JsPlatforms.defaultJsPlatform
     override val kotlinPluginName: String = KOTLIN_JS
     override fun getKotlinPluginExpression(forKotlinDsl: Boolean): String =
         if (forKotlinDsl) "id(\"kotlin2js\")" else "id 'kotlin2js'"

idea/idea-gradle/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/GradleFacetImportTest.kt

@@ -47,12 +47,12 @@ import org.jetbrains.kotlin.idea.framework.KotlinSdkType
 import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.idea.util.projectStructure.allModules
 import org.jetbrains.kotlin.idea.util.projectStructure.sdk
-import org.jetbrains.kotlin.js.resolve.JsPlatform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.platform.impl.JvmIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.isCommon
 import org.jetbrains.kotlin.platform.impl.isJavaScript
-import org.jetbrains.kotlin.resolve.TargetPlatform
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.js.JsPlatforms
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.test.KotlinTestUtils
 import org.junit.Assert
 import org.junit.Ignore
@@ -933,9 +933,9 @@ class GradleFacetImportTest : GradleImportingTestCase() {
         configureByFiles()
         importProject()
 
-        checkStableModuleName("project_main", "project", JsPlatform, isProduction = true)
+        checkStableModuleName("project_main", "project", JsPlatforms.defaultJsPlatform, isProduction = true)
         // Note "_test" suffix: this is current behavior of K2JS Compiler
-        checkStableModuleName("project_test", "project_test", JsPlatform, isProduction = false)
+        checkStableModuleName("project_test", "project_test", JsPlatforms.defaultJsPlatform, isProduction = false)
 
         assertAllModulesConfigured()
     }
@@ -945,8 +945,8 @@ class GradleFacetImportTest : GradleImportingTestCase() {
         configureByFiles()
         importProject()
 
-        checkStableModuleName("project_main", "project", JvmPlatform, isProduction = true)
-        checkStableModuleName("project_test", "project", JvmPlatform, isProduction = false)
+        checkStableModuleName("project_main", "project", JvmPlatforms.defaultJvmPlatform, isProduction = true)
+        checkStableModuleName("project_test", "project", JvmPlatforms.defaultJvmPlatform, isProduction = false)
 
         assertAllModulesConfigured()
     }

idea/idea-jps-common/src/org/jetbrains/kotlin/config/KotlinFacetSettings.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.cli.common.arguments.copyBean
 import org.jetbrains.kotlin.cli.common.arguments.parseCommandLineArguments
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.utils.DescriptionAware
 
 @Deprecated("Use IdePlatformKind instead.", level = DeprecationLevel.ERROR)

idea/idea-jps-common/src/org/jetbrains/kotlin/platform/DefaultIdeTargetPlatformKindProvider.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.platform
 import com.intellij.openapi.components.ServiceManager
 import org.jetbrains.kotlin.config.isJps
 import org.jetbrains.kotlin.platform.impl.JvmIdePlatformKind
-import org.jetbrains.kotlin.resolve.TargetPlatform
 
 interface DefaultIdeTargetPlatformKindProvider {
     val defaultPlatform: IdePlatform<*, *>

idea/idea-jps-common/src/org/jetbrains/kotlin/platform/IdePlatform.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.platform
 
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
 import org.jetbrains.kotlin.utils.DescriptionAware
 
 abstract class IdePlatform<Kind : IdePlatformKind<Kind>, out Arguments : CommonCompilerArguments> : DescriptionAware {

idea/idea-jps-common/src/org/jetbrains/kotlin/platform/IdePlatformKind.kt

@@ -13,7 +13,6 @@ import org.jetbrains.kotlin.platform.impl.CommonIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.JsIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.JvmIdePlatformKind
 import org.jetbrains.kotlin.platform.impl.NativeIdePlatformKind
-import org.jetbrains.kotlin.resolve.TargetPlatform
 import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
 
 abstract class IdePlatformKind<Kind : IdePlatformKind<Kind>> {

idea/idea-jps-common/src/org/jetbrains/kotlin/platform/impl/CommonIdePlatformKind.kt

@@ -6,12 +6,12 @@
 @file:JvmName("CommonIdePlatformUtil")
 package org.jetbrains.kotlin.platform.impl
 
-import org.jetbrains.kotlin.analyzer.common.CommonPlatform
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
 import org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
+import org.jetbrains.kotlin.platform.CommonPlatforms
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 
 object CommonIdePlatformKind : IdePlatformKind<CommonIdePlatformKind>() {
 
@@ -20,7 +20,7 @@ object CommonIdePlatformKind : IdePlatformKind<CommonIdePlatformKind>() {
         else null
     }
 
-    override val compilerPlatform get() = CommonPlatform
+    override val compilerPlatform get() = CommonPlatforms.defaultCommonPlatform
 
     override val platforms get() = listOf(Platform)
     override val defaultPlatform get() = Platform

idea/idea-jps-common/src/org/jetbrains/kotlin/platform/impl/JsIdePlatformKind.kt

@@ -8,10 +8,10 @@ package org.jetbrains.kotlin.platform.impl
 
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
 import org.jetbrains.kotlin.cli.common.arguments.K2JSCompilerArguments
-import org.jetbrains.kotlin.config.TargetPlatformVersion
-import org.jetbrains.kotlin.js.resolve.JsPlatform
+import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
+import org.jetbrains.kotlin.platform.js.JsPlatforms
 
 object JsIdePlatformKind : IdePlatformKind<JsIdePlatformKind>() {
 
@@ -20,7 +20,7 @@ object JsIdePlatformKind : IdePlatformKind<JsIdePlatformKind>() {
         else null
     }
 
-    override val compilerPlatform get() = JsPlatform
+    override val compilerPlatform get() = JsPlatforms.defaultJsPlatform
 
     override val platforms get() = listOf(Platform)
     override val defaultPlatform get() = Platform

idea/idea-jps-common/src/org/jetbrains/kotlin/platform/impl/JvmIdePlatformKind.kt

@@ -13,7 +13,7 @@ import org.jetbrains.kotlin.cli.common.arguments.K2JVMCompilerArguments
 import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.platform.IdePlatform
 import org.jetbrains.kotlin.platform.IdePlatformKind
-import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatform
+import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 
 object JvmIdePlatformKind : IdePlatformKind<JvmIdePlatformKind>() {
 
@@ -26,7 +26,7 @@ object JvmIdePlatformKind : IdePlatformKind<JvmIdePlatformKind>() {
         } else null
     }
 
-    override val compilerPlatform get() = JvmPlatform
+    override val compilerPlatform get() = JvmPlatforms.defaultJvmPlatform
 
     override val platforms = JvmTarget.values().map { ver -> Platform(ver) }
     override val defaultPlatform get() = Platform(JvmTarget.DEFAULT)