Move: Fix ClassCastException on processing of callable references to Java methods

#KT-16809 Fixed

.idea/ant.xml

@@ -3,7 +3,7 @@
   <component name="AntConfiguration">
     <buildFile url="file://$PROJECT_DIR$/compiler/frontend/buildLexer.xml" />
     <buildFile url="file://$PROJECT_DIR$/build.xml">
-      <antCommandLine value="-J-XX:MaxPermSize=100m -J-ea" />
+      <antCommandLine value="-J-ea" />
       <maximumHeapSize value="1024" />
     </buildFile>
     <buildFile url="file://$PROJECT_DIR$/update_dependencies.xml" />

.idea/artifacts/KotlinJpsPlugin.xml

@@ -11,7 +11,6 @@
       <element id="directory" name="META-INF">
         <element id="dir-copy" path="$PROJECT_DIR$/jps-plugin/src/META-INF" />
       </element>
-      <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/cli-parser-1.1.2.jar" path-in-jar="/" />
       <element id="module-output" name="cli-common" />
       <element id="module-output" name="idea-jps-common" />
       <element id="module-output" name="jps-plugin" />

.idea/dictionaries/4u7.xml

@@ -0,0 +1,7 @@
+<component name="ProjectDictionaryState">
+  <dictionary name="4u7">
+    <words>
+      <w>foldable</w>
+    </words>
+  </dictionary>
+</component>

.idea/inspectionProfiles/idea_default.xml

@@ -1,7 +1,6 @@
 <component name="InspectionProjectProfileManager">
-  <profile version="1.0" is_locked="false">
+  <profile version="1.0">
     <option name="myName" value="idea.default" />
-    <option name="myLocal" value="false" />
     <inspection_tool class="AbstractMethodCallInConstructor" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ArchaicSystemPropertyAccess" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="AssignmentToForLoopParameter" enabled="true" level="WARNING" enabled_by_default="true">
@@ -236,10 +235,6 @@
       <scope name="idea openapi" level="WARNING" enabled="true" />
       <scope name="runtime.classes" level="ERROR" enabled="true" />
     </inspection_tool>
-    <inspection_tool class="LoggerInitializedWithForeignClass" enabled="false" level="WARNING" enabled_by_default="false">
-      <option name="loggerClassName" value="org.apache.log4j.Logger,org.slf4j.LoggerFactory,org.apache.commons.logging.LogFactory,java.util.logging.Logger" />
-      <option name="loggerFactoryMethodName" value="getLogger,getLogger,getLog,getLogger" />
-    </inspection_tool>
     <inspection_tool class="LoopToCallChain" enabled="false" level="INFO" enabled_by_default="false" />
     <inspection_tool class="MethodMayBeStatic" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="m_onlyPrivateOrFinal" value="false" />
@@ -347,11 +342,12 @@
         <constraint name="__context__" script="&quot;&quot;" within="" contains="" />
       </searchConfiguration>
     </inspection_tool>
+    <inspection_tool class="SameParameterValue" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="SetReplaceableByEnumSet" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SetupCallsSuperSetup" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SetupIsPublicVoidNoArg" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="SimplifiableIfStatement" enabled="false" level="WARNING" enabled_by_default="false" />
-    <inspection_tool class="Since15" enabled="true" level="ERROR" enabled_by_default="true">
+    <inspection_tool class="Since15" enabled="false" level="ERROR" enabled_by_default="false">
       <scope name="IDEA Test Sources" level="ERROR" enabled="false" />
     </inspection_tool>
     <inspection_tool class="SocketResource" enabled="true" level="WARNING" enabled_by_default="true">

.idea/libraries/cli_parser.xml

@@ -1,11 +0,0 @@
-<component name="libraryTable">
-  <library name="cli-parser">
-    <CLASSES>
-      <root url="jar://$PROJECT_DIR$/dependencies/cli-parser-1.1.2.jar!/" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES>
-      <root url="jar://$PROJECT_DIR$/dependencies/cli-parser-1.1.2-sources.jar!/" />
-    </SOURCES>
-  </library>
-</component>

.idea/libraries/guava.xml

@@ -4,11 +4,11 @@
       <root url="file://$PROJECT_DIR$/annotations" />
     </ANNOTATIONS>
     <CLASSES>
-      <root url="jar://$PROJECT_DIR$/ideaSDK/lib/guava-17.0.jar!/" />
+      <root url="jar://$PROJECT_DIR$/ideaSDK/lib/guava-19.0.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$PROJECT_DIR$/dependencies/guava-17.0-sources.jar!/" />
+      <root url="jar://$PROJECT_DIR$/dependencies/guava-19.0-sources.jar!/" />
     </SOURCES>
   </library>
 </component>

.idea/libraries/idea_full.xml

@@ -9,7 +9,7 @@
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$PROJECT_DIR$/dependencies/guava-17.0-sources.jar!/" />
+      <root url="jar://$PROJECT_DIR$/dependencies/guava-19.0-sources.jar!/" />
       <root url="jar://$PROJECT_DIR$/dependencies/asm5-src.zip!/" />
       <root url="jar://$PROJECT_DIR$/ideaSDK/sources/sources.jar!/" />
     </SOURCES>

.idea/libraries/intellij_core.xml

@@ -9,7 +9,7 @@
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$PROJECT_DIR$/dependencies/guava-17.0-sources.jar!/" />
+      <root url="jar://$PROJECT_DIR$/dependencies/guava-19.0-sources.jar!/" />
       <root url="jar://$PROJECT_DIR$/dependencies/asm5-src.zip!/" />
       <root url="jar://$PROJECT_DIR$/ideaSDK/sources/sources.jar!/" />
     </SOURCES>

.idea/libraries/intellij_core_analysis.xml

@@ -10,7 +10,7 @@
     <JAVADOC />
     <SOURCES>
       <root url="jar://$PROJECT_DIR$/dependencies/asm5-src.zip!/" />
-      <root url="jar://$PROJECT_DIR$/dependencies/guava-17.0-sources.jar!/" />
+      <root url="jar://$PROJECT_DIR$/dependencies/guava-19.0-sources.jar!/" />
       <root url="jar://$PROJECT_DIR$/ideaSDK/sources/sources.jar!/" />
     </SOURCES>
   </library>

.idea/libraries/properties.xml

@@ -5,6 +5,7 @@
     </ANNOTATIONS>
     <CLASSES>
       <root url="jar://$PROJECT_DIR$/ideaSDK/plugins/properties/lib/properties.jar!/" />
+      <root url="jar://$PROJECT_DIR$/ideaSDK/plugins/properties/lib/resources_en.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>

.idea/misc.xml

@@ -6,7 +6,6 @@
     </properties>
   </component>
   <component name="EntryPointsManager">
-    <entry_points version="2.0" />
     <list size="1">
       <item index="0" class="java.lang.String" itemvalue="javax.inject.Inject" />
     </list>
@@ -49,7 +48,7 @@
   <component name="ProjectResources">
     <default-html-doctype>http://www.w3.org/1999/xhtml</default-html-doctype>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" default="false" assert-keyword="true" jdk-15="true" project-jdk-name="1.6" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" default="false" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="SuppressABINotification">

.idea/modules.xml

@@ -92,6 +92,7 @@
       <module fileurl="file://$PROJECT_DIR$/plugins/sam-with-receiver/sam-with-receiver-ide/sam-with-receiver-ide.iml" filepath="$PROJECT_DIR$/plugins/sam-with-receiver/sam-with-receiver-ide/sam-with-receiver-ide.iml" />
       <module fileurl="file://$PROJECT_DIR$/core/script.runtime/script.runtime.iml" filepath="$PROJECT_DIR$/core/script.runtime/script.runtime.iml" group="core" />
       <module fileurl="file://$PROJECT_DIR$/compiler/serialization/serialization.iml" filepath="$PROJECT_DIR$/compiler/serialization/serialization.iml" group="compiler" />
+      <module fileurl="file://$PROJECT_DIR$/plugins/source-sections/source-sections-compiler/source-sections-compiler.iml" filepath="$PROJECT_DIR$/plugins/source-sections/source-sections-compiler/source-sections-compiler.iml" group="plugins" />
       <module fileurl="file://$PROJECT_DIR$/compiler/tests-common/tests-common.iml" filepath="$PROJECT_DIR$/compiler/tests-common/tests-common.iml" group="compiler" />
       <module fileurl="file://$PROJECT_DIR$/compiler/tests-ir-jvm/tests-ir-jvm.iml" filepath="$PROJECT_DIR$/compiler/tests-ir-jvm/tests-ir-jvm.iml" group="compiler/ir" />
       <module fileurl="file://$PROJECT_DIR$/plugins/uast-kotlin/uast-kotlin.iml" filepath="$PROJECT_DIR$/plugins/uast-kotlin/uast-kotlin.iml" group="plugins/lint" />

.idea/runConfigurations/All_Jvm_Backend_Tests.xml

@@ -13,7 +13,7 @@
     <option name="MAIN_CLASS_NAME" value="" />
     <option name="METHOD_NAME" value="" />
     <option name="TEST_OBJECT" value="package" />
-    <option name="VM_PARAMETERS" value="-ea -XX:+HeapDumpOnOutOfMemoryError -Xmx900m -XX:MaxPermSize=320m -XX:+UseCodeCacheFlushing -XX:ReservedCodeCacheSize=64m  -Djna.nosys=true" />
+    <option name="VM_PARAMETERS" value="-ea -XX:+HeapDumpOnOutOfMemoryError -Xmx1024m -XX:+UseCodeCacheFlushing -XX:ReservedCodeCacheSize=64m -Djna.nosys=true" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$" />
     <option name="ENV_VARIABLES" />

.idea/runConfigurations/All_Non_Compiler_Tests.xml

@@ -13,7 +13,7 @@
     <option name="MAIN_CLASS_NAME" value="" />
     <option name="METHOD_NAME" value="" />
     <option name="TEST_OBJECT" value="package" />
-    <option name="VM_PARAMETERS" value="-ea -XX:+HeapDumpOnOutOfMemoryError -Xmx1100m -XX:+UseCodeCacheFlushing -XX:ReservedCodeCacheSize=128m -Djna.nosys=true" />
+    <option name="VM_PARAMETERS" value="-ea -XX:+HeapDumpOnOutOfMemoryError -Xmx900m -XX:+UseCodeCacheFlushing -XX:ReservedCodeCacheSize=128m -Djna.nosys=true" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$" />
     <option name="ENV_VARIABLES" />

.idea/runConfigurations/Compiler_Tests.xml

@@ -13,7 +13,7 @@
     <option name="MAIN_CLASS_NAME" value="" />
     <option name="METHOD_NAME" value="" />
     <option name="TEST_OBJECT" value="package" />
-    <option name="VM_PARAMETERS" value="-ea -XX:+HeapDumpOnOutOfMemoryError -Xmx700m -XX:MaxPermSize=300m -XX:+UseCodeCacheFlushing -XX:ReservedCodeCacheSize=64m  -Djna.nosys=true" />
+    <option name="VM_PARAMETERS" value="-ea -XX:+HeapDumpOnOutOfMemoryError -Xmx1024m -XX:+UseCodeCacheFlushing -XX:ReservedCodeCacheSize=64m -Djna.nosys=true" />
     <option name="PARAMETERS" value="" />
     <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$" />
     <option name="ENV_VARIABLES" />

ChangeLog.md

@@ -3,6 +3,42 @@
 <!-- Find: ([^\`/\[])(KT-\d+) -->
 <!-- Replace: $1[`$2`](https://youtrack.jetbrains.com/issue/$2) -->
 
+## 1.1.1
+
+### IDE
+- [`KT-16714`](https://youtrack.jetbrains.com/issue/KT-16714) J2K: Write access is allowed from event dispatch thread only
+
+### Compiler
+- [`KT-16801`](https://youtrack.jetbrains.com/issue/KT-16801) Accessors of `@PublishedApi` property gets mangled
+- [`KT-16673`](https://youtrack.jetbrains.com/issue/KT-16673) Potentially problematic code causes exception when work with SAM adapters
+
+### Libraries
+- [`KT-16557`](https://youtrack.jetbrains.com/issue/KT-16557) Correct `SinceKotlin(1.1)` for all declarations in `kotlin.reflect.full`
+
+## 1.1.1-RC
+
+### IDE
+- [`KT-16481`](https://youtrack.jetbrains.com/issue/KT-16481) Kotlin debugger & bytecode fail on select statement blocks (IllegalStateException: More than one package fragment)
+
+### Gradle support
+- [`KT-15783`](https://youtrack.jetbrains.com/issue/KT-15783) Gradle builds don't use incremental compilation due to an error: "Could not connect to kotlin daemon"
+- [`KT-16434`](https://youtrack.jetbrains.com/issue/KT-16434) Gradle plugin does not compile androidTest sources when Jack is enabled
+- [`KT-16546`](https://youtrack.jetbrains.com/issue/KT-16546) Enable incremental compilation in gradle by default
+
+### Compiler
+- [`KT-16184`](https://youtrack.jetbrains.com/issue/KT-16184) AbstractMethodError in Kapt3ComponentRegistrar while compiling from IntelliJ using Kotlin 1.1.0
+- [`KT-16578`](https://youtrack.jetbrains.com/issue/KT-16578) Fix substitutor for synthetic SAM adapters
+- [`KT-16581`](https://youtrack.jetbrains.com/issue/KT-16581) VerifyError when calling default value parameter with jvm-target 1.8
+- [`KT-16583`](https://youtrack.jetbrains.com/issue/KT-16583) Cannot access private file-level variables inside a class init within the same file if a secondary constructor is present
+- [`KT-16587`](https://youtrack.jetbrains.com/issue/KT-16587) AbstractMethodError: Delegates not generated correctly for private interfaces
+- [`KT-16598`](https://youtrack.jetbrains.com/issue/KT-16598) Incorrect error: The feature "bound callable references" is only available since language version 1.1
+- [`KT-16621`](https://youtrack.jetbrains.com/issue/KT-16621) Kotlin compiler doesn't report an error if a class implements Annotation interface but doesn't implement annotationType method
+- [`KT-16441`](https://youtrack.jetbrains.com/issue/KT-16441) `NoSuchFieldError: $$delegatedProperties` when delegating through `provideDelegate` in companion object
+
+### JavaScript support
+- Prohibit function types with receiver as parameter types of external declarations
+- Remove extension receiver for function parameters in `jQuery` declarations
+
 ## 1.1
 
 ### Compiler exceptions
@@ -12,6 +48,7 @@
 
 ### Standard library
 - [`KT-6561`](https://youtrack.jetbrains.com/issue/KT-6561) Drop java.util.Collections package from js stdlib
+- `javaClass` extension property is no more deprecated due to migration problems
 
 ### IDE
 - [`KT-16329`](https://youtrack.jetbrains.com/issue/KT-16329) Inspection "Calls to staic methods in Java interfaces..." always reports warning undependent of jvm-target

ant/src/org/jetbrains/kotlin/ant/KotlinAntTaskUtil.kt

@@ -29,8 +29,8 @@ internal object KotlinAntTaskUtil {
 
     private val libPath: File by lazy {
         // Find path of kotlin-ant.jar in the filesystem and find kotlin-compiler.jar in the same directory
-        val resourcePath = "/" + javaClass.name.replace('.', '/') + ".class"
-        val jarConnection = javaClass.getResource(resourcePath).openConnection() as? JarURLConnection
+        val resourcePath = "/" + this::class.java.name.replace('.', '/') + ".class"
+        val jarConnection = this::class.java.getResource(resourcePath).openConnection() as? JarURLConnection
                             ?: throw UnsupportedOperationException("Kotlin compiler Ant task should be loaded from the JAR file")
         val antTaskJarPath = File(jarConnection.jarFileURL.toURI())
 
@@ -54,7 +54,7 @@ internal object KotlinAntTaskUtil {
         val cached = classLoaderRef.get()
         if (cached != null) return cached
 
-        val myLoader = javaClass.classLoader
+        val myLoader = this::class.java.classLoader
         if (myLoader !is AntClassLoader) return myLoader
 
         val classLoader = ClassPreloadingUtils.preloadClasses(listOf(compilerJar), Preloader.DEFAULT_CLASS_NUMBER_ESTIMATE, myLoader, null)

build-common/src/org/jetbrains/kotlin/compilerRunner/ArgumentUtils.java

@@ -19,9 +19,9 @@ package org.jetbrains.kotlin.compilerRunner;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.util.Function;
 import com.intellij.util.containers.ComparatorUtil;
-import com.sampullara.cli.Argument;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments;
+import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Argument;
 
 import java.lang.reflect.Field;
 import java.util.ArrayList;

build-common/src/org/jetbrains/kotlin/incremental/IncrementalCacheImpl.kt

@@ -43,7 +43,6 @@ import org.jetbrains.kotlin.serialization.deserialization.TypeTable
 import org.jetbrains.kotlin.serialization.deserialization.supertypes
 import org.jetbrains.kotlin.serialization.jvm.BitEncoding
 import org.jetbrains.kotlin.serialization.jvm.JvmProtoBufUtil
-import org.jetbrains.kotlin.utils.singletonOrEmptyList
 import org.jetbrains.org.objectweb.asm.*
 import java.io.File
 import java.security.MessageDigest
@@ -272,7 +271,7 @@ open class IncrementalCacheImpl<Target>(
                                     ProtoBuf.Class::getPropertyList
                             ) + classData.classProto.enumEntryList.map { classData.nameResolver.getString(it.name) }
 
-                    val companionObjectChanged = createChangeInfo(classFqName.parent(), classFqName.shortName().asString().singletonOrEmptyList())
+                    val companionObjectChanged = createChangeInfo(classFqName.parent(), listOfNotNull(classFqName.shortName().asString()))
                     val companionObjectMembersChanged = createChangeInfo(classFqName, memberNames)
 
                     listOf(companionObjectMembersChanged, companionObjectChanged)
@@ -780,7 +779,7 @@ sealed class ChangeInfo(val fqName: FqName) {
     protected open fun toStringProperties(): String = "fqName = $fqName"
 
     override fun toString(): String {
-        return this.javaClass.simpleName + "(${toStringProperties()})"
+        return this::class.java.simpleName + "(${toStringProperties()})"
     }
 }
 

build-common/src/org/jetbrains/kotlin/incremental/LocalFileKotlinClass.kt

@@ -50,5 +50,5 @@ class LocalFileKotlinClass private constructor(
 
     override fun hashCode(): Int = file.hashCode()
     override fun equals(other: Any?): Boolean = other is LocalFileKotlinClass && file == other.file
-    override fun toString(): String = "$javaClass: $file"
+    override fun toString(): String = "${this::class.java}: $file"
 }

build-common/src/org/jetbrains/kotlin/incremental/buildUtil.kt

@@ -42,7 +42,7 @@ import java.util.*
 
 
 fun Iterable<File>.javaSourceRoots(roots: Iterable<File>): Iterable<File> =
-        filter { it.isJavaFile() }
+        filter(File::isJavaFile)
                 .map { findSrcDirRoot(it, roots) }
                 .filterNotNull()
 
@@ -145,7 +145,7 @@ fun LookupStorage.update(
         filesToCompile: Iterable<File>,
         removedFiles: Iterable<File>
 ) {
-    if (lookupTracker !is LookupTrackerImpl) throw AssertionError("Lookup tracker is expected to be LookupTrackerImpl, got ${lookupTracker.javaClass}")
+    if (lookupTracker !is LookupTrackerImpl) throw AssertionError("Lookup tracker is expected to be LookupTrackerImpl, got ${lookupTracker::class.java}")
 
     removeLookupsFrom(filesToCompile.asSequence() + removedFiles.asSequence())
 

build-common/src/org/jetbrains/kotlin/incremental/storage/BasicMap.kt

@@ -46,7 +46,7 @@ abstract class BasicMap<K : Comparable<K>, V>(
     fun dump(): String {
         return with(StringBuilder()) {
             with(Printer(this)) {
-                println(this@BasicMap.javaClass.simpleName)
+                println(this@BasicMap::class.java.simpleName)
                 pushIndent()
 
                 for (key in storage.keys.sorted()) {

build-common/src/org/jetbrains/kotlin/incremental/storage/externalizers.kt

@@ -131,7 +131,7 @@ object ConstantsMapExternalizer : DataExternalizer<Map<String, Any>> {
                     output.writeByte(Kind.STRING.ordinal)
                     IOUtil.writeString(value, output)
                 }
-                else -> throw IllegalStateException("Unexpected constant class: ${value.javaClass}")
+                else -> throw IllegalStateException("Unexpected constant class: ${value::class.java}")
             }
         }
     }

build-common/test/org/jetbrains/kotlin/incremental/testingUtils/classFilesComparison.kt

@@ -144,7 +144,7 @@ private fun classFileToString(classFile: File): String {
 
             out.write("\n------ string table types proto -----\n${DebugJvmProtoBuf.StringTableTypes.parseDelimitedFrom(input)}")
 
-            if (!classHeader!!.metadataVersion.isCompatible()) {
+            if (!classHeader.metadataVersion.isCompatible()) {
                 error("Incompatible class ($classHeader): $classFile")
             }
 

build-common/test/org/jetbrains/kotlin/incremental/testingUtils/incrementalModificationUtils.kt

@@ -81,8 +81,8 @@ fun getModificationsToPerform(
 
         val rules = mapOf<String, (String, File) -> Modification>(
                 newSuffix to { path, file -> ModifyContent(path, file) },
-                touchSuffix to { path, file -> TouchFile(path, touchPolicy) },
-                deleteSuffix to { path, file -> DeleteFile(path) }
+                touchSuffix to { path, _ -> TouchFile(path, touchPolicy) },
+                deleteSuffix to { path, _ -> DeleteFile(path) }
         )
 
         val modifications = ArrayList<Modification>()
@@ -130,7 +130,7 @@ fun getModificationsToPerform(
 abstract class Modification(val path: String) {
     abstract fun perform(workDir: File, mapping: MutableMap<File, File>)
 
-    override fun toString(): String = "${javaClass.simpleName} $path"
+    override fun toString(): String = "${this::class.java.simpleName} $path"
 }
 
 class ModifyContent(path: String, val dataFile: File) : Modification(path) {

build.xml

@@ -1,4 +1,4 @@
-<project name="Kotlin" default="dist" xmlns:if="ant:if" xmlns:unless="ant:unless">
+<project xmlns:if="ant:if" xmlns:unless="ant:unless" name="Kotlin" default="dist">
     <import file="common.xml" optional="false"/>
     <property file="resources/kotlinManifest.properties"/>
 
@@ -28,7 +28,8 @@
     <property name="protobuf-lite.jar" value="${basedir}/dependencies/protobuf-2.6.1-lite.jar"/>
     <property name="javax.inject.jar" value="${basedir}/lib/javax.inject.jar"/>
 
-    <property name="java.target" value="1.6"/>
+    <property name="java.target" value="1.8"/>
+    <property name="java.target.1.6" value="1.6"/>
 
     <condition property="bootstrap.or.local.build" value="true">
         <or>
@@ -72,7 +73,6 @@
         <fileset dir="${basedir}/lib" includes="**/*.jar"/>
         <fileset dir="${dependencies}" includes="jansi.jar"/>
         <fileset dir="${dependencies}" includes="jline.jar"/>
-        <fileset dir="${dependencies}" includes="cli-parser-1.1.2.jar"/>
         <fileset dir="${basedir}/ideaSDK/jps" includes="jps-model.jar"/>
     </path>
 
@@ -406,9 +406,12 @@
                        byline="true" encoding="UTF-8" />
     </target>
 
-    <target name="js-stdlib">
-        <property environment="env"/>
+    <target name="js-stdlib-preprocess">
         <kotlin-pp src="libraries/stdlib/src" output="${intermediate-sources}/stdlib/js" profile="JS" />
+    </target>
+
+    <target name="js-stdlib" depends="js-stdlib-preprocess">
+        <property environment="env"/>
         <cleandir dir="${js.stdlib.output.dir}"/>
 
         <!-- We don't want descriptors for built-ins to be serialized, so we compile these files separately. -->
@@ -474,7 +477,7 @@
         <copy file="${kotlin-home}/lib/kotlin-stdlib-js.jar" tofile="${kotlin-home}/lib/kotlin-jslib.jar" />
     </target>
 
-    <target name="pack-js-stdlib-sources">
+    <target name="pack-js-stdlib-sources" depends="js-stdlib-preprocess">
         <jar destfile="${kotlin-home}/lib/kotlin-stdlib-js-sources.jar" duplicate="fail">
             <resources refid="js.lib.files" />
             <fileset refid="kotlin.builtin.files" />
@@ -586,7 +589,6 @@
                 <zipfileset src="${idea.sdk}/lib/oromatcher.jar"/>
                 <zipfileset src="${idea.sdk}/jps/jps-model.jar"/>
                 <zipfileset src="${dependencies}/jline.jar"/>
-                <zipfileset src="${dependencies}/cli-parser-1.1.2.jar"/>
                 <zipfileset src="${protobuf.jar}"/>
 
                 <manifest>
@@ -764,7 +766,7 @@
                 <attribute name="Built-By" value="${manifest.impl.vendor}"/>
 
                 <attribute name="Implementation-Vendor" value="${manifest.impl.vendor}"/>
-                <attribute name="Implementation-Title" value="${manifest.impl.title.kotlin.daemon-client}"/>
+                <attribute name="Implementation-Title" value="${manifest.impl.title.kotlin.daemon.client}"/>
                 <attribute name="Implementation-Version" value="${build.number}"/>
             </manifest>
         </jar>
@@ -784,6 +786,27 @@
         </jar>
     </target>
 
+    <target name="compiler-client-embeddable">
+        <taskdef name="jarjar" classname="com.tonicsystems.jarjar.JarJarTask" classpath="dependencies/jarjar.jar"/>
+
+        <jarjar jarfile="${output}/kotlin-compiler-client-embeddable-before-shrink.jar">
+            <zipfileset file="${kotlin-home}/build.txt" prefix="META-INF"/>
+            <zipfileset src="${kotlin-home}/lib/kotlin-daemon-client.jar"/>
+            <fileset dir="${output}/classes/compiler"
+                    includes="org/jetbrains/kotlin/daemon/common/** org/jetbrains/kotlin/cli/common/messages/CompilerMessage*  org/jetbrains/kotlin/cli/common/messages/Message*  org/jetbrains/kotlin/cli/common/repl/**"/>
+
+            <manifest>
+                <attribute name="Built-By" value="${manifest.impl.vendor}"/>
+                <attribute name="Implementation-Vendor" value="${manifest.impl.vendor}"/>
+                <attribute name="Implementation-Title" value="${manifest.impl.title.kotlin.compiler.client,embeddable}"/>
+                <attribute name="Implementation-Version" value="${build.number}"/>
+                <attribute name="Class-Path" value="kotlin-stdlib.jar"/>
+            </manifest>
+        </jarjar>
+
+        <shrink configuration="${basedir}/compiler/compiler-client.pro"/>
+    </target>
+
     <target name="android-extensions-compiler">
         <cleandir dir="${output}/classes/android-extensions/android-extensions-compiler"/>
         <javac2 destdir="${output}/classes/android-extensions/android-extensions-compiler" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">
@@ -876,6 +899,29 @@
         </jar>
     </target>
 
+    <target name="source-sections-compiler-plugin">
+        <cleandir dir="${output}/classes/source-sections-compiler-plugin"/>
+        <javac2 destdir="${output}/classes/source-sections-compiler-plugin" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">
+            <withKotlin modulename="source-sections">
+                <compilerarg value="-version"/>
+            </withKotlin>
+            <skip pattern="kotlin/Metadata"/>
+            <src>
+                <pathelement path="plugins/source-sections/source-sections-compiler/src"/>
+            </src>
+            <classpath>
+                <pathelement path="${idea.sdk}/core/intellij-core.jar"/>
+                <pathelement path="${kotlin-home}/lib/kotlin-compiler.jar"/>
+            </classpath>
+        </javac2>
+
+        <jar destfile="${kotlin-home}/lib/source-sections-compiler-plugin.jar">
+            <fileset dir="${output}/classes/source-sections-compiler-plugin"/>
+            <zipfileset file="${kotlin-home}/build.txt" prefix="META-INF"/>
+            <fileset dir="${basedir}/plugins/source-sections/source-sections-compiler/src" includes="META-INF/services/**"/>
+        </jar>
+    </target>
+
     <target name="annotation-processing-under-jdk8">
         <property environment="env"/>
 
@@ -1013,7 +1059,7 @@
             </java>
 
             <javac2 srcdir="${toString:src.dirset}" destdir="@{output}" debug="true" debuglevel="lines,vars,source"
-                    includeAntRuntime="false" source="${java.target}" target="${java.target}">
+                    includeAntRuntime="false" source="${java.target.1.6}" target="${java.target.1.6}">
                 <skip pattern="kotlin/Metadata"/>
                 <classpath>
                     <path refid="classpath.path"/>
@@ -1032,13 +1078,13 @@
         <sequential>
             <java classname="org.jetbrains.kotlin.preloading.Preloader" failonerror="true" fork="true" maxmemory="${max.heap.size.for.forked.jvm}">
                 <classpath>
-                    <pathelement location="${kotlin-home}/lib/kotlin-preloader.jar"/>
+                    <pathelement location="${bootstrap.compiler.home}/lib/kotlin-preloader.jar"/>
                 </classpath>
                 <assertions>
                     <enable/>
                 </assertions>
                 <arg value="-cp"/>
-                <arg value="${kotlin-home}/lib/kotlin-compiler.jar"/>
+                <arg value="${bootstrap.compiler.home}/lib/kotlin-compiler.jar"/>
                 <arg value="org.jetbrains.kotlin.preprocessor.PreprocessorCLI"/>
                 <arg value="@{src}"/>
                 <arg value="@{output}"/>
@@ -1338,11 +1384,11 @@
             depends="builtins,stdlib,kotlin-test,core,reflection,pack-runtime,pack-runtime-sources,script-runtime,mock-runtime-for-test"/>
 
     <target name="dist"
-            depends="clean,init,prepare-dist,preloader,runner,serialize-builtins,compiler,compiler-sources,ant-tools,runtime,kotlin-js-stdlib,android-extensions-compiler,allopen-compiler-plugin,noarg-compiler-plugin,sam-with-receiver-compiler-plugin,annotation-processing-under-jdk8,daemon-client,kotlin-build-common-test"
+            depends="clean,init,prepare-dist,preloader,runner,serialize-builtins,compiler,compiler-sources,ant-tools,runtime,kotlin-js-stdlib,android-extensions-compiler,allopen-compiler-plugin,noarg-compiler-plugin,sam-with-receiver-compiler-plugin,source-sections-compiler-plugin,annotation-processing-under-jdk8,daemon-client,kotlin-build-common-test"
             description="Builds redistributables from sources"/>
 
     <target name="dist-quick"
-            depends="clean,init,prepare-dist,preloader,serialize-builtins,compiler-quick,ant-tools,runtime,kotlin-js-stdlib,android-extensions-compiler,allopen-compiler-plugin,noarg-compiler-plugin,sam-with-receiver-compiler-plugin,annotation-processing-under-jdk8"
+            depends="clean,init,prepare-dist,preloader,serialize-builtins,compiler-quick,ant-tools,runtime,kotlin-js-stdlib,android-extensions-compiler,allopen-compiler-plugin,noarg-compiler-plugin,sam-with-receiver-compiler-plugin,source-sections-compiler-plugin,annotation-processing-under-jdk8"
             description="Builds everything, but classes are reused from project out dir, doesn't run proguard and javadoc"/>
 
     <target name="dist-quick-compiler-only"

compiler/android-tests/tests/org/jetbrains/kotlin/android/tests/AndroidJpsBuildTestCase.java

@@ -29,8 +29,8 @@ public class AndroidJpsBuildTestCase extends BaseKotlinJpsBuildTestCase {
 
     public void doTest() {
         initProject();
-        rebuildAll();
-        makeAll().assertSuccessful();
+        rebuildAllModules();
+        buildAllModules().assertSuccessful();
     }
 
     @Override

compiler/backend-common/src/org/jetbrains/kotlin/backend/common/CodegenUtil.kt

@@ -91,7 +91,7 @@ object CodegenUtil {
         else if (traitMember is PropertyDescriptor) {
             for (traitAccessor in traitMember.accessors) {
                 for (inheritedAccessor in (copy as PropertyDescriptor).accessors) {
-                    if (inheritedAccessor.javaClass == traitAccessor.javaClass) { // same accessor kind
+                    if (inheritedAccessor::class.java == traitAccessor::class.java) { // same accessor kind
                         result.put(traitAccessor, inheritedAccessor)
                     }
                 }

compiler/backend-common/src/org/jetbrains/kotlin/backend/common/DataClassMethodGenerator.kt

@@ -103,5 +103,5 @@ abstract class DataClassMethodGenerator(private val declaration: KtClassOrObject
                 .map { bindingContext.get(BindingContext.PRIMARY_CONSTRUCTOR_PARAMETER, it)!! }
 
     private val primaryConstructorParameters: List<KtParameter>
-        get() = (declaration as? KtClass)?.getPrimaryConstructorParameters().orEmpty()
+        get() = (declaration as? KtClass)?.primaryConstructorParameters.orEmpty()
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/ClassBodyCodegen.java

@@ -77,9 +77,13 @@ public abstract class ClassBodyCodegen extends MemberCodegen<KtPureClassOrObject
             }
         }
 
-        generatePrimaryConstructorProperties();
-        generateConstructors();
-        generateDefaultImplsIfNeeded();
+        boolean generateNonClassMembers = shouldGenerateNonClassMembers();
+
+        if (generateNonClassMembers) {
+            generatePrimaryConstructorProperties();
+            generateConstructors();
+            generateDefaultImplsIfNeeded();
+        }
 
         // Generate _declared_ companions
         for (KtObjectDeclaration companion : companions) {
@@ -92,23 +96,30 @@ public abstract class ClassBodyCodegen extends MemberCodegen<KtPureClassOrObject
             genSyntheticClassOrObject((SyntheticClassOrObjectDescriptor) companionObjectDescriptor);
         }
 
-        if (!DescriptorUtils.isInterface(descriptor)) {
-            for (DeclarationDescriptor memberDescriptor : DescriptorUtils.getAllDescriptors(descriptor.getDefaultType().getMemberScope())) {
-                if (memberDescriptor instanceof CallableMemberDescriptor) {
-                    CallableMemberDescriptor member = (CallableMemberDescriptor) memberDescriptor;
-                    if (!member.getKind().isReal() && ImplKt.findInterfaceImplementation(member) == null) {
-                        if (member instanceof FunctionDescriptor) {
-                            functionCodegen.generateBridges((FunctionDescriptor) member);
+        if (generateNonClassMembers) {
+            generateBridges();
+        }
+    }
+
+    private void generateBridges() {
+        if (DescriptorUtils.isInterface(descriptor)) {
+            return;
+        }
+        for (DeclarationDescriptor memberDescriptor : DescriptorUtils.getAllDescriptors(descriptor.getDefaultType().getMemberScope())) {
+            if (memberDescriptor instanceof CallableMemberDescriptor) {
+                CallableMemberDescriptor member = (CallableMemberDescriptor) memberDescriptor;
+                if (!member.getKind().isReal() && ImplKt.findInterfaceImplementation(member) == null) {
+                    if (member instanceof FunctionDescriptor) {
+                        functionCodegen.generateBridges((FunctionDescriptor) member);
+                    }
+                    else if (member instanceof PropertyDescriptor) {
+                        PropertyGetterDescriptor getter = ((PropertyDescriptor) member).getGetter();
+                        if (getter != null) {
+                            functionCodegen.generateBridges(getter);
                         }
-                        else if (member instanceof PropertyDescriptor) {
-                            PropertyGetterDescriptor getter = ((PropertyDescriptor) member).getGetter();
-                            if (getter != null) {
-                                functionCodegen.generateBridges(getter);
-                            }
-                            PropertySetterDescriptor setter = ((PropertyDescriptor) member).getSetter();
-                            if (setter != null) {
-                                functionCodegen.generateBridges(setter);
-                            }
+                        PropertySetterDescriptor setter = ((PropertyDescriptor) member).getSetter();
+                        if (setter != null) {
+                            functionCodegen.generateBridges(setter);
                         }
                     }
                 }
@@ -116,6 +127,11 @@ public abstract class ClassBodyCodegen extends MemberCodegen<KtPureClassOrObject
         }
     }
 
+    private boolean shouldGenerateNonClassMembers() {
+        return !(myClass instanceof KtClassOrObject) ||
+               state.getGenerateDeclaredClassFilter().shouldGenerateClassMembers((KtClassOrObject) myClass);
+    }
+
     protected void generateConstructors() {
 
     }
@@ -130,7 +146,9 @@ public abstract class ClassBodyCodegen extends MemberCodegen<KtPureClassOrObject
 
     protected void generateDeclaration(KtDeclaration declaration) {
         if (declaration instanceof KtProperty || declaration instanceof KtNamedFunction || declaration instanceof KtTypeAlias) {
-            genSimpleMember(declaration);
+            if (shouldGenerateNonClassMembers()) {
+                genSimpleMember(declaration);
+            }
         }
         else if (declaration instanceof KtClassOrObject) {
             if (declaration instanceof KtEnumEntry && !enumEntryNeedSubclass(bindingContext, (KtEnumEntry) declaration)) {

compiler/backend/src/org/jetbrains/kotlin/codegen/ClassBuilderFactories.java

@@ -55,20 +55,12 @@ public class ClassBuilderFactories {
             throw new IllegalStateException();
         }
     };
-
-    public static ClassBuilderFactory TEST_KAPT3 = new TestClassBuilderFactory(false) {
-        @NotNull
-        @Override
-        public ClassBuilderMode getClassBuilderMode() {
-            return ClassBuilderMode.KAPT3;
-        }
-    };
     
     public static ClassBuilderFactory TEST = new TestClassBuilderFactory(false);
 
     public static ClassBuilderFactory TEST_WITH_SOURCE_RETENTION_ANNOTATIONS = new TestClassBuilderFactory(true);
     
-    private static class TestClassBuilderFactory implements ClassBuilderFactory {
+    public static class TestClassBuilderFactory implements ClassBuilderFactory {
         private final boolean generateSourceRetentionAnnotations;
 
         public TestClassBuilderFactory(boolean generateSourceRetentionAnnotations) {

compiler/backend/src/org/jetbrains/kotlin/codegen/ClassBuilderMode.java

@@ -16,6 +16,8 @@
 
 package org.jetbrains.kotlin.codegen;
 
+import org.jetbrains.annotations.TestOnly;
+
 public class ClassBuilderMode {
     public final boolean generateBodies;
     public final boolean generateMetadata;
@@ -73,4 +75,11 @@ public class ClassBuilderMode {
             /* metadata = */ true,
             /* sourceRetention = */ true,
             /* generateMultiFileFacadePartClasses = */ true);
+
+    @TestOnly
+    public final static ClassBuilderMode LIGHT_ANALYSIS_FOR_TESTS = new ClassBuilderMode(
+            /* bodies = */ false,
+            /* metadata = */ true,
+            /* sourceRetention = */ false,
+            /* generateMultiFileFacadePartClasses = */ true);
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java

@@ -82,7 +82,7 @@ public class ClassFileFactory implements OutputFileCollection {
         return answer;
     }
 
-    void done() {
+    public void done() {
         if (!isDone) {
             isDone = true;
             writeModuleMappings();

compiler/backend/src/org/jetbrains/kotlin/codegen/DefaultParameterValueSubstitutor.kt

@@ -54,7 +54,7 @@ class DefaultParameterValueSubstitutor(val state: GenerationState) {
             contextKind: OwnerKind,
             classOrObject: KtPureClassOrObject
     ) {
-        val methodElement = classOrObject.getPrimaryConstructor() ?: classOrObject
+        val methodElement = classOrObject.primaryConstructor ?: classOrObject
 
         if (generateOverloadsIfNeeded(methodElement, constructorDescriptor, constructorDescriptor, contextKind, classBuilder, memberCodegen)) {
             return
@@ -135,7 +135,7 @@ class DefaultParameterValueSubstitutor(val state: GenerationState) {
                 (if (isStatic) Opcodes.ACC_STATIC else 0) or
                 (if (functionDescriptor.modality == Modality.FINAL && functionDescriptor !is ConstructorDescriptor) Opcodes.ACC_FINAL else 0) or
                 (if (remainingParameters.lastOrNull()?.varargElementType != null) Opcodes.ACC_VARARGS else 0)
-        val signature = typeMapper.mapSignature(functionDescriptor, contextKind, remainingParameters, false)
+        val signature = typeMapper.mapSignatureWithCustomParameters(functionDescriptor, contextKind, remainingParameters, false)
         val mv = classBuilder.newMethod(OtherOrigin(methodElement, functionDescriptor), flags,
                                         signature.asmMethod.name,
                                         signature.asmMethod.descriptor,
@@ -251,7 +251,7 @@ class DefaultParameterValueSubstitutor(val state: GenerationState) {
         val classDescriptor = constructorDescriptor.constructedClass
         if (classDescriptor.kind != ClassKind.CLASS) return false
 
-        if (classOrObject.isLocal()) return false
+        if (classOrObject.isLocal) return false
 
         if (CodegenBinding.canHaveOuter(state.bindingContext, classDescriptor)) return false
 
@@ -265,6 +265,6 @@ class DefaultParameterValueSubstitutor(val state: GenerationState) {
     }
 
     private fun hasSecondaryConstructorsWithNoParameters(klass: KtClass) =
-        klass.getSecondaryConstructors().any { it.valueParameters.isEmpty() }
+        klass.secondaryConstructors.any { it.valueParameters.isEmpty() }
 
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/DelegatingClassBuilderFactory.kt

@@ -33,10 +33,10 @@ abstract class DelegatingClassBuilderFactory(
     abstract override fun newClassBuilder(origin: JvmDeclarationOrigin): DelegatingClassBuilder
 
     override fun asBytes(builder: ClassBuilder?): ByteArray? {
-        return delegate.asBytes((builder as DelegatingClassBuilder).getDelegate())
+        return delegate.asBytes((builder as DelegatingClassBuilder).delegate)
     }
 
     override fun asText(builder: ClassBuilder?): String? {
-        return delegate.asText((builder as DelegatingClassBuilder).getDelegate())
+        return delegate.asText((builder as DelegatingClassBuilder).delegate)
     }
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -1919,11 +1919,6 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
         return asmType(varType);
     }
 
-    private static boolean isSharedVarType(@NotNull Type type) {
-        return type.getSort() == Type.OBJECT && type.getInternalName().startsWith(REF_TYPE_PREFIX);
-    }
-
-
     private void putDescriptorIntoFrameMap(@NotNull KtElement statement) {
         if (statement instanceof KtDestructuringDeclaration) {
             KtDestructuringDeclaration multiDeclaration = (KtDestructuringDeclaration) statement;
@@ -4320,6 +4315,8 @@ public class ExpressionCodegen extends KtVisitor<StackValue, StackValue> impleme
     private static ReceiverValue getConstructorReceiver(@NotNull ResolvedCall<?> resolvedCall) {
         CallableDescriptor constructor = resolvedCall.getResultingDescriptor();
         if (constructor.getExtensionReceiverParameter() != null) {
+            // see comment on `withDispatchReceiver` parameter in
+            // org.jetbrains.kotlin.descriptors.impl.TypeAliasConstructorDescriptorImpl.Companion.createIfAvailable
             assert constructor instanceof TypeAliasConstructorDescriptor :
                     "Only type alias constructor can have an extension receiver: " + constructor;
             return resolvedCall.getExtensionReceiver();

compiler/backend/src/org/jetbrains/kotlin/codegen/FunctionCodegen.java

@@ -920,17 +920,23 @@ public class FunctionCodegen {
         // enum constructors have two additional synthetic parameters which somewhat complicate this task
         AnnotationCodegen.forMethod(mv, memberCodegen, typeMapper).genAnnotations(functionDescriptor, defaultMethod.getReturnType());
 
-        if (state.getClassBuilderMode().generateBodies) {
-            if (this.owner instanceof MultifileClassFacadeContext) {
-                mv.visitCode();
-                generateFacadeDelegateMethodBody(mv, defaultMethod, (MultifileClassFacadeContext) this.owner);
+        if (!state.getClassBuilderMode().generateBodies) {
+            if (this.owner instanceof MultifileClassFacadeContext)
                 endVisit(mv, "default method delegation", getSourceFromDescriptor(functionDescriptor));
-            }
-            else {
-                mv.visitCode();
-                generateDefaultImplBody(owner, functionDescriptor, mv, loadStrategy, function, memberCodegen, defaultMethod);
+            else
                 endVisit(mv, "default method", getSourceFromDescriptor(functionDescriptor));
-            }
+            return;
+        }
+
+        if (this.owner instanceof MultifileClassFacadeContext) {
+            mv.visitCode();
+            generateFacadeDelegateMethodBody(mv, defaultMethod, (MultifileClassFacadeContext) this.owner);
+            endVisit(mv, "default method delegation", getSourceFromDescriptor(functionDescriptor));
+        }
+        else {
+            mv.visitCode();
+            generateDefaultImplBody(owner, functionDescriptor, mv, loadStrategy, function, memberCodegen, defaultMethod);
+            endVisit(mv, "default method", getSourceFromDescriptor(functionDescriptor));
         }
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java

@@ -88,6 +88,7 @@ import static org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin.
 import static org.jetbrains.kotlin.types.Variance.INVARIANT;
 import static org.jetbrains.kotlin.types.expressions.ExpressionTypingUtils.isLocalFunction;
 import static org.jetbrains.org.objectweb.asm.Opcodes.*;
+import static org.jetbrains.org.objectweb.asm.Type.getObjectType;
 
 public class ImplementationBodyCodegen extends ClassBodyCodegen {
     private static final String ENUM_VALUES_FIELD_NAME = "$VALUES";
@@ -113,7 +114,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
             boolean isLocal
     ) {
         super(aClass, context, v, state, parentCodegen);
-        this.classAsmType = typeMapper.mapClass(descriptor);
+        this.classAsmType = getObjectType(typeMapper.classInternalName(descriptor));
         this.isLocal = isLocal;
         delegationFieldsInfo = getDelegationFieldsInfo(myClass.getSuperTypeListEntries());
     }
@@ -127,55 +128,47 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
         boolean isAbstract = false;
         boolean isInterface = false;
         boolean isFinal = false;
-        boolean isStatic;
         boolean isAnnotation = false;
         boolean isEnum = false;
 
         ClassKind kind = descriptor.getKind();
 
-        if (kind == ClassKind.OBJECT) {
-            isStatic = isCompanionObject(descriptor);
-            isFinal = true;
+        Modality modality = descriptor.getModality();
+
+        if (modality == Modality.ABSTRACT || modality == Modality.SEALED) {
+            isAbstract = true;
         }
-        else {
-            Modality modality = descriptor.getModality();
 
-            if (modality == Modality.ABSTRACT || modality == Modality.SEALED) {
-                isAbstract = true;
-            }
+        if (kind == ClassKind.INTERFACE) {
+            isAbstract = true;
+            isInterface = true;
+        }
+        else if (kind == ClassKind.ANNOTATION_CLASS) {
+            isAbstract = true;
+            isInterface = true;
+            isAnnotation = true;
+        }
+        else if (kind == ClassKind.ENUM_CLASS) {
+            isAbstract = hasAbstractMembers(descriptor);
+            isEnum = true;
+        }
 
-            if (kind == ClassKind.INTERFACE) {
-                isAbstract = true;
-                isInterface = true;
-            }
-            else if (kind == ClassKind.ANNOTATION_CLASS) {
-                isAbstract = true;
-                isInterface = true;
-                isAnnotation = true;
-            }
-            else if (kind == ClassKind.ENUM_CLASS) {
-                isAbstract = hasAbstractMembers(descriptor);
-                isEnum = true;
-            }
-
-            if (modality != Modality.OPEN && !isAbstract) {
-                // Light-class mode: Do not make enum classes final since PsiClass corresponding to enum is expected to be inheritable from
-                isFinal = !(kind == ClassKind.ENUM_CLASS && !state.getClassBuilderMode().generateBodies);
-            }
-
-            isStatic = !descriptor.isInner();
+        if (modality != Modality.OPEN && !isAbstract) {
+            isFinal = kind == ClassKind.OBJECT ||
+                      // Light-class mode: Do not make enum classes final since PsiClass corresponding to enum is expected to be inheritable from
+                      !(kind == ClassKind.ENUM_CLASS && !state.getClassBuilderMode().generateBodies);
         }
 
         int access = 0;
 
-        if (!state.getClassBuilderMode().generateBodies && !DescriptorUtils.isTopLevelDeclaration(descriptor)) {
+        if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES && !DescriptorUtils.isTopLevelDeclaration(descriptor)) {
             // !ClassBuilderMode.generateBodies means we are generating light classes & looking at a nested or inner class
             // Light class generation is implemented so that Cls-classes only read bare code of classes,
             // without knowing whether these classes are inner or not (see ClassStubBuilder.EMPTY_STRATEGY)
             // Thus we must write full accessibility flags on inner classes in this mode
             access |= getVisibilityAccessFlag(descriptor);
             // Same for STATIC
-            if (isStatic) {
+            if (!descriptor.isInner()) {
                 access |= ACC_STATIC;
             }
         }
@@ -332,7 +325,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
 
         for (String kotlinMarkerInterface : kotlinMarkerInterfaces) {
             sw.writeInterface();
-            sw.writeAsmType(Type.getObjectType(kotlinMarkerInterface));
+            sw.writeAsmType(getObjectType(kotlinMarkerInterface));
             sw.writeInterfaceEnd();
         }
 
@@ -1207,9 +1200,9 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
                     }
                 }
                 else if (descriptor instanceof VariableDescriptor) {
-                    if (descriptor.getContainingDeclaration() instanceof ConstructorDescriptor) {
-                        ClassDescriptor classDescriptor =
-                                (ClassDescriptor) descriptor.getContainingDeclaration().getContainingDeclaration();
+                    DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration();
+                    if (containingDeclaration instanceof ConstructorDescriptor) {
+                        ClassDescriptor classDescriptor = ((ConstructorDescriptor) containingDeclaration).getConstructedClass();
                         if (classDescriptor == ImplementationBodyCodegen.this.descriptor) return;
                     }
                     lookupInContext(descriptor);

compiler/backend/src/org/jetbrains/kotlin/codegen/MemberCodegen.java

@@ -127,7 +127,10 @@ public abstract class MemberCodegen<T extends KtPureElement/* TODO: & KtDeclarat
 
         generateBody();
 
-        generateSyntheticParts();
+        if (!(element instanceof KtClassOrObject) ||
+            state.getGenerateDeclaredClassFilter().shouldGenerateClassMembers((KtClassOrObject) element)) {
+            generateSyntheticParts();
+        }
 
         if (state.getClassBuilderMode().generateMetadata) {
             generateKotlinMetadataAnnotation();
@@ -342,17 +345,19 @@ public abstract class MemberCodegen<T extends KtPureElement/* TODO: & KtDeclarat
     }
 
     private void writeInnerClass(@NotNull ClassDescriptor innerClass) {
-        writeInnerClass(innerClass, typeMapper, v);
+        if (!ErrorUtils.isError(innerClass)) {
+            writeInnerClass(innerClass, typeMapper, v);
+        }
     }
 
     public static void writeInnerClass(@NotNull ClassDescriptor innerClass, @NotNull KotlinTypeMapper typeMapper, @NotNull ClassBuilder v) {
         DeclarationDescriptor containing = innerClass.getContainingDeclaration();
         String outerClassInternalName = null;
         if (containing instanceof ClassDescriptor) {
-            outerClassInternalName = typeMapper.mapClass((ClassDescriptor) containing).getInternalName();
+            outerClassInternalName = typeMapper.classInternalName((ClassDescriptor) containing);
         }
         String innerName = innerClass.getName().isSpecial() ? null : innerClass.getName().asString();
-        String innerClassInternalName = typeMapper.mapClass(innerClass).getInternalName();
+        String innerClassInternalName = typeMapper.classInternalName(innerClass);
         v.visitInnerClass(innerClassInternalName, outerClassInternalName, innerName, calculateInnerClassAccessFlags(innerClass));
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/MultifileClassPartCodegen.kt

@@ -176,7 +176,7 @@ class MultifileClassPartCodegen(
         }
 
         val serializer = DescriptorSerializer.createTopLevel(JvmSerializerExtension(v.serializationBindings, state))
-        val packageProto = serializer.packagePartProto(members).build()
+        val packageProto = serializer.packagePartProto(packageFragment.fqName, members).build()
 
         val extraFlags = if (shouldGeneratePartHierarchy) JvmAnnotationNames.METADATA_MULTIFILE_PARTS_INHERIT_FLAG else 0
 

compiler/backend/src/org/jetbrains/kotlin/codegen/PackagePartCodegen.java

@@ -129,7 +129,7 @@ public class PackagePartCodegen extends MemberCodegen<KtFile> {
 
         final DescriptorSerializer serializer =
                 DescriptorSerializer.createTopLevel(new JvmSerializerExtension(v.getSerializationBindings(), state));
-        final ProtoBuf.Package packageProto = serializer.packagePartProto(members).build();
+        final ProtoBuf.Package packageProto = serializer.packagePartProto(element.getPackageFqName(), members).build();
 
         WriteAnnotationUtilKt.writeKotlinMetadata(v, state, KotlinClassHeader.Kind.FILE_FACADE, 0, new Function1<AnnotationVisitor, Unit>() {
             @Override

compiler/backend/src/org/jetbrains/kotlin/codegen/PropertyCodegen.java

@@ -57,7 +57,6 @@ import java.util.List;
 
 import static org.jetbrains.kotlin.codegen.AsmUtil.getDeprecatedAccessFlag;
 import static org.jetbrains.kotlin.codegen.AsmUtil.getVisibilityForBackingField;
-import static org.jetbrains.kotlin.codegen.AsmUtil.isPropertyWithBackingFieldCopyInOuterClass;
 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isConstOrHasJvmFieldAnnotation;
 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isJvmInterface;
 import static org.jetbrains.kotlin.codegen.serialization.JvmSerializationBindings.FIELD_FOR_PROPERTY;
@@ -189,7 +188,7 @@ public class PropertyCodegen {
         if (isCompanionObject(descriptor.getContainingDeclaration())) return true;
 
         // Non-const properties from multifile classes have accessors regardless of visibility
-        if (!descriptor.isConst() && JvmFileClassUtilKt.isInsideJvmMultifileClassFile(declaration)) return true;
+        if (isNonConstTopLevelPropertyInMultifileClass(declaration, descriptor)) return true;
 
         // Private class properties have accessors only in cases when those accessors are non-trivial
         if (Visibilities.isPrivate(descriptor.getVisibility())) {
@@ -199,6 +198,15 @@ public class PropertyCodegen {
         return true;
     }
 
+    private static boolean isNonConstTopLevelPropertyInMultifileClass(
+            @NotNull KtProperty declaration,
+            @NotNull PropertyDescriptor descriptor
+    ) {
+        return !descriptor.isConst() &&
+               descriptor.getContainingDeclaration() instanceof PackageFragmentDescriptor &&
+               JvmFileClassUtilKt.isInsideJvmMultifileClassFile(declaration);
+    }
+
     private static boolean areAccessorsNeededForPrimaryConstructorProperty(
             @NotNull PropertyDescriptor descriptor
     ) {

compiler/backend/src/org/jetbrains/kotlin/codegen/SourceInfo.kt

@@ -34,7 +34,7 @@ data class SourceInfo(val source: String, val pathOrCleanFQN: String, val linesI
             val isTopLevel = element is KtFile || (element is KtNamedFunction && element.getParent() is KtFile)
             val cleanedClassFqName = if (!isTopLevel) internalClassName else internalClassName.substringBefore('$')
 
-            return SourceInfo(element.getContainingKtFile().name, cleanedClassFqName, lineNumbers!!)
+            return SourceInfo(element.containingKtFile.name, cleanedClassFqName, lineNumbers!!)
         }
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/StackValue.java

@@ -48,6 +48,7 @@ import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodParameterSignature
 import org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue;
 import org.jetbrains.kotlin.types.KotlinType;
 import org.jetbrains.org.objectweb.asm.Label;
+import org.jetbrains.org.objectweb.asm.Opcodes;
 import org.jetbrains.org.objectweb.asm.Type;
 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
 
@@ -281,60 +282,29 @@ public abstract class StackValue {
     }
 
     private static void box(Type type, Type toType, InstructionAdapter v) {
-        if (type == Type.BYTE_TYPE || toType.getInternalName().equals(NULLABLE_BYTE_TYPE_NAME) && type == Type.INT_TYPE) {
-            v.cast(type, Type.BYTE_TYPE);
-            v.invokestatic(NULLABLE_BYTE_TYPE_NAME, "valueOf", "(B)L" + NULLABLE_BYTE_TYPE_NAME + ";", false);
-        }
-        else if (type == Type.SHORT_TYPE || toType.getInternalName().equals(NULLABLE_SHORT_TYPE_NAME) && type == Type.INT_TYPE) {
-            v.cast(type, Type.SHORT_TYPE);
-            v.invokestatic(NULLABLE_SHORT_TYPE_NAME, "valueOf", "(S)L" + NULLABLE_SHORT_TYPE_NAME + ";", false);
-        }
-        else if (type == Type.LONG_TYPE || toType.getInternalName().equals(NULLABLE_LONG_TYPE_NAME) && type == Type.INT_TYPE) {
-            v.cast(type, Type.LONG_TYPE);
-            v.invokestatic(NULLABLE_LONG_TYPE_NAME, "valueOf", "(J)L" + NULLABLE_LONG_TYPE_NAME + ";", false);
-        }
-        else if (type == Type.INT_TYPE) {
-            v.invokestatic("java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;", false);
-        }
-        else if (type == Type.BOOLEAN_TYPE) {
-            v.invokestatic("java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;", false);
-        }
-        else if (type == Type.CHAR_TYPE) {
-            v.invokestatic("java/lang/Character", "valueOf", "(C)Ljava/lang/Character;", false);
-        }
-        else if (type == Type.FLOAT_TYPE) {
-            v.invokestatic("java/lang/Float", "valueOf", "(F)Ljava/lang/Float;", false);
-        }
-        else if (type == Type.DOUBLE_TYPE) {
-            v.invokestatic("java/lang/Double", "valueOf", "(D)Ljava/lang/Double;", false);
+        if (type == Type.INT_TYPE) {
+            if (toType.getInternalName().equals(NULLABLE_BYTE_TYPE_NAME)) {
+                type = Type.BYTE_TYPE;
+            }
+            else if (toType.getInternalName().equals(NULLABLE_SHORT_TYPE_NAME)) {
+                type = Type.SHORT_TYPE;
+            }
+            else if (toType.getInternalName().equals(NULLABLE_LONG_TYPE_NAME)) {
+                type = Type.LONG_TYPE;
+            }
+            v.cast(Type.INT_TYPE, type);
         }
+
+        Type boxedType = AsmUtil.boxType(type);
+        if (boxedType == type) return;
+
+        v.invokestatic(boxedType.getInternalName(), "valueOf", Type.getMethodDescriptor(boxedType, type), false);
+        coerce(boxedType, toType,  v);
     }
 
-    private static void unbox(Type type, InstructionAdapter v) {
-        if (type == Type.INT_TYPE) {
-            v.invokevirtual("java/lang/Number", "intValue", "()I", false);
-        }
-        else if (type == Type.BOOLEAN_TYPE) {
-            v.invokevirtual("java/lang/Boolean", "booleanValue", "()Z", false);
-        }
-        else if (type == Type.CHAR_TYPE) {
-            v.invokevirtual("java/lang/Character", "charValue", "()C", false);
-        }
-        else if (type == Type.SHORT_TYPE) {
-            v.invokevirtual("java/lang/Number", "shortValue", "()S", false);
-        }
-        else if (type == Type.LONG_TYPE) {
-            v.invokevirtual("java/lang/Number", "longValue", "()J", false);
-        }
-        else if (type == Type.BYTE_TYPE) {
-            v.invokevirtual("java/lang/Number", "byteValue", "()B", false);
-        }
-        else if (type == Type.FLOAT_TYPE) {
-            v.invokevirtual("java/lang/Number", "floatValue", "()F", false);
-        }
-        else if (type == Type.DOUBLE_TYPE) {
-            v.invokevirtual("java/lang/Number", "doubleValue", "()D", false);
-        }
+    private static void unbox(Type methodOwner, Type type, InstructionAdapter v) {
+        assert isPrimitive(type) : "Unboxing should be performed to primitive type, but " + type.getClassName();
+        v.invokevirtual(methodOwner.getInternalName(), type.getClassName() + "Value", "()" + type.getDescriptor(), false);
     }
 
     protected void coerceTo(@NotNull Type toType, @NotNull InstructionAdapter v) {
@@ -372,23 +342,12 @@ public abstract class StackValue {
             }
         }
         else if (toType.getSort() == Type.ARRAY) {
-            if (fromType.getSort() == Type.ARRAY &&
-                fromType.getElementType().equals(AsmTypes.JAVA_CLASS_TYPE) && toType.equals(K_CLASS_ARRAY_TYPE)) {
-                wrapJavaClassesIntoKClasses(v);
-            }
-            else {
-                v.checkcast(toType);
-            }
+            v.checkcast(toType);
         }
         else if (toType.getSort() == Type.OBJECT) {
             if (fromType.getSort() == Type.OBJECT || fromType.getSort() == Type.ARRAY) {
                 if (!toType.equals(OBJECT_TYPE)) {
-                    if (fromType.equals(AsmTypes.JAVA_CLASS_TYPE) && toType.equals(AsmTypes.K_CLASS_TYPE)) {
-                        wrapJavaClassIntoKClass(v);
-                    }
-                    else {
-                        v.checkcast(toType);
-                    }
+                    v.checkcast(toType);
                 }
             }
             else {
@@ -396,20 +355,29 @@ public abstract class StackValue {
             }
         }
         else if (fromType.getSort() == Type.OBJECT) {
+            //toType is primitive here
             Type unboxedType = unboxPrimitiveTypeOrNull(fromType);
             if (unboxedType != null) {
-                unbox(unboxedType, v);
+                unbox(fromType, unboxedType, v);
                 coerce(unboxedType, toType, v);
             }
-            else {
-                Type numberType = getType(Number.class);
-                if (toType.getSort() == Type.BOOLEAN || (toType.getSort() == Type.CHAR && !numberType.equals(fromType))) {
-                    coerce(fromType, boxType(toType), v);
+            else if (toType.getSort() == Type.BOOLEAN) {
+                coerce(fromType, BOOLEAN_WRAPPER_TYPE, v);
+                unbox(BOOLEAN_WRAPPER_TYPE, Type.BOOLEAN_TYPE, v);
+            }
+            else if (toType.getSort() == Type.CHAR) {
+                if (fromType.equals(NUMBER_TYPE)) {
+                    unbox(NUMBER_TYPE, Type.INT_TYPE, v);
+                    v.visitInsn(Opcodes.I2C);
                 }
                 else {
-                    coerce(fromType, numberType, v);
+                    coerce(fromType, CHARACTER_WRAPPER_TYPE, v);
+                    unbox(CHARACTER_WRAPPER_TYPE, Type.CHAR_TYPE, v);
                 }
-                unbox(toType, v);
+            }
+            else {
+                coerce(fromType, NUMBER_TYPE, v);
+                unbox(NUMBER_TYPE, toType, v);
             }
         }
         else {
@@ -1211,7 +1179,20 @@ public abstract class StackValue {
                 else {
                     getter.genInvokeInstruction(v);
                 }
-                coerce(getter.getReturnType(), type, v);
+
+                Type typeOfValueOnStack = getter.getReturnType();
+                if (DescriptorUtils.isAnnotationClass(descriptor.getContainingDeclaration())) {
+                    if (this.type.equals(K_CLASS_TYPE)) {
+                        wrapJavaClassIntoKClass(v);
+                        typeOfValueOnStack = K_CLASS_TYPE;
+                    }
+                    else if (this.type.equals(K_CLASS_ARRAY_TYPE)) {
+                        wrapJavaClassesIntoKClasses(v);
+                        typeOfValueOnStack = K_CLASS_ARRAY_TYPE;
+                    }
+                }
+
+                coerce(typeOfValueOnStack, type, v);
 
                 KotlinType returnType = descriptor.getReturnType();
                 if (returnType != null && KotlinBuiltIns.isNothing(returnType)) {
@@ -1378,9 +1359,7 @@ public abstract class StackValue {
             default:
                 PrimitiveType primitiveType = AsmUtil.asmPrimitiveTypeToLangPrimitiveType(type);
                 if (primitiveType == null) throw new UnsupportedOperationException();
-
-                String typeName = primitiveType.getTypeName().getIdentifier();
-                return Type.getObjectType(REF_TYPE_PREFIX + typeName + "Ref");
+                return sharedTypeForPrimitive(primitiveType);
         }
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/builtinSpecialBridges.kt

@@ -35,7 +35,6 @@ import org.jetbrains.kotlin.resolve.calls.callUtil.getParentCall
 import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
 import org.jetbrains.kotlin.resolve.descriptorUtil.overriddenTreeAsSequence
 import org.jetbrains.kotlin.utils.addIfNotNull
-import org.jetbrains.kotlin.utils.singletonOrEmptyList
 import java.util.*
 
 class BridgeForBuiltinSpecial<out Signature : Any>(
@@ -76,7 +75,7 @@ object BuiltinSpecialBridgesUtil {
         else null
 
         val commonBridges = reachableDeclarations.mapTo(LinkedHashSet<Signature>(), signatureByDescriptor)
-        commonBridges.removeAll(specialBridgesSignaturesInSuperClass + specialBridge?.from.singletonOrEmptyList())
+        commonBridges.removeAll(specialBridgesSignaturesInSuperClass + listOfNotNull(specialBridge?.from))
 
         if (fake) {
             for (overridden in function.overriddenDescriptors.map { it.original }) {

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineCodegen.kt

@@ -42,7 +42,6 @@ import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.makeNullable
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
-import org.jetbrains.kotlin.utils.singletonOrEmptyList
 import org.jetbrains.org.objectweb.asm.Label
 import org.jetbrains.org.objectweb.asm.MethodVisitor
 import org.jetbrains.org.objectweb.asm.Opcodes
@@ -289,8 +288,8 @@ class CoroutineCodegen private constructor(
     }
 
     private fun allFunctionParameters() =
-                originalSuspendFunctionDescriptor.extensionReceiverParameter.singletonOrEmptyList() +
-                originalSuspendFunctionDescriptor.valueParameters.orEmpty()
+            listOfNotNull(originalSuspendFunctionDescriptor.extensionReceiverParameter) +
+            originalSuspendFunctionDescriptor.valueParameters.orEmpty()
 
     private fun ParameterDescriptor.getFieldInfoForCoroutineLambdaParameter() =
             createHiddenFieldInfo(type, COROUTINE_LAMBDA_PARAMETER_PREFIX + (this.safeAs<ValueParameterDescriptor>()?.index ?: ""))

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineTransformationClassBuilder.kt

@@ -294,7 +294,7 @@ class CoroutineTransformerMethodVisitor(
         get() {
             assert(suspensionCallEnd.next is LabelNode) {
                 "Next instruction after ${this} should be a label, but " +
-                "${suspensionCallEnd.next.javaClass}/${suspensionCallEnd.next.opcode} was found"
+                "${suspensionCallEnd.next::class.java}/${suspensionCallEnd.next.opcode} was found"
             }
 
             return suspensionCallEnd.next as LabelNode
@@ -421,7 +421,7 @@ private fun InstructionAdapter.generateResumeWithExceptionCheck() {
 
 private fun Type.fieldNameForVar(index: Int) = descriptor.first() + "$" + index
 
-private fun withInstructionAdapter(block: InstructionAdapter.() -> Unit): InsnList {
+inline fun withInstructionAdapter(block: InstructionAdapter.() -> Unit): InsnList {
     val tmpMethodNode = MethodNode()
 
     InstructionAdapter(tmpMethodNode).apply(block)

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/refinedIntTypesAnalysis.kt

@@ -217,7 +217,7 @@ private class VarExpectedTypeFrame(maxLocals: Int) : VarFrame<VarExpectedTypeFra
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other?.javaClass != javaClass) return false
+        if (other == null || other::class.java != this::class.java) return false
 
         other as VarExpectedTypeFrame
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/AnonymousObjectTransformer.java

@@ -66,7 +66,6 @@ public class AnonymousObjectTransformer extends ObjectTransformer<AnonymousObjec
         createClassReader().accept(new ClassVisitor(InlineCodegenUtil.API, classBuilder.getVisitor()) {
             @Override
             public void visit(int version, int access, @NotNull String name, String signature, String superName, String[] interfaces) {
-                InlineCodegenUtil.assertVersionNotGreaterThanGeneratedOne(version, name, inliningContext.state);
                 classBuilder.defineClass(null, version, access, name, signature, superName, interfaces);
                 if(CoroutineCodegenUtilKt.COROUTINE_IMPL_ASM_TYPE.getInternalName().equals(superName)) {
                     inliningContext.setContinuation(true);
@@ -271,7 +270,7 @@ public class AnonymousObjectTransformer extends ObjectTransformer<AnonymousObjec
         //TODO for inline method make public class
         transformationInfo.setNewConstructorDescriptor(constructorDescriptor);
         MethodVisitor constructorVisitor = classBuilder.newMethod(
-                NO_ORIGIN, AsmUtil.NO_FLAG_PACKAGE_PRIVATE, "<init>", constructorDescriptor, null, ArrayUtil.EMPTY_STRING_ARRAY
+                NO_ORIGIN, constructor.access, "<init>", constructorDescriptor, null, ArrayUtil.EMPTY_STRING_ARRAY
         );
 
         final Label newBodyStartLabel = new Label();
@@ -312,7 +311,7 @@ public class AnonymousObjectTransformer extends ObjectTransformer<AnonymousObjec
         }
 
         MethodNode intermediateMethodNode =
-                new MethodNode(AsmUtil.NO_FLAG_PACKAGE_PRIVATE, "<init>", constructorDescriptor, null, ArrayUtil.EMPTY_STRING_ARRAY);
+                new MethodNode(constructor.access, "<init>", constructorDescriptor, null, ArrayUtil.EMPTY_STRING_ARRAY);
         inlineMethodAndUpdateGlobalResult(parentRemapper, intermediateMethodNode, constructor, constructorInlineBuilder, true);
         InlineCodegenUtil.removeFinallyMarkers(intermediateMethodNode);
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/InlineCodegen.java

@@ -38,6 +38,7 @@ import org.jetbrains.kotlin.load.kotlin.incremental.components.IncrementalCache;
 import org.jetbrains.kotlin.name.ClassId;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.psi.*;
+import org.jetbrains.kotlin.renderer.DescriptorRenderer;
 import org.jetbrains.kotlin.resolve.BindingContext;
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
 import org.jetbrains.kotlin.resolve.DescriptorUtils;
@@ -202,7 +203,7 @@ public class InlineCodegen extends CallGenerator {
         MethodNode node = nodeAndSmap != null ? nodeAndSmap.getNode() : null;
         throw new CompilationException(
                 "Couldn't inline method call '" + functionDescriptor.getName() + "' into\n" +
-                contextDescriptor + "\n" +
+                DescriptorRenderer.DEBUG_TEXT.render(contextDescriptor) + "\n" +
                 (element != null ? element.getText() : "<no source>") +
                 (generateNodeText ? ("\nCause: " + InlineCodegenUtil.getNodeText(node)) : ""),
                 e, callElement
@@ -321,7 +322,7 @@ public class InlineCodegen extends CallGenerator {
                 }
             });
 
-            return InlineCodegenUtil.getMethodNode(bytes, asmMethod.getName(), asmMethod.getDescriptor(), classId, state);
+            return InlineCodegenUtil.getMethodNode(bytes, asmMethod.getName(), asmMethod.getDescriptor(), classId);
         }
 
         assert callableDescriptor instanceof DeserializedCallableMemberDescriptor : "Not a deserialized function or proper: " + callableDescriptor;
@@ -348,7 +349,7 @@ public class InlineCodegen extends CallGenerator {
         });
 
 
-        return InlineCodegenUtil.getMethodNode(bytes, asmMethod.getName(), asmMethod.getDescriptor(), containerId, state);
+        return InlineCodegenUtil.getMethodNode(bytes, asmMethod.getName(), asmMethod.getDescriptor(), containerId);
     }
 
     @NotNull

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/InlineCodegenUtil.java

@@ -39,7 +39,7 @@ import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.fileClasses.FileClasses;
 import org.jetbrains.kotlin.fileClasses.JvmFileClassesProvider;
 import org.jetbrains.kotlin.load.java.JvmAbi;
-import org.jetbrains.kotlin.load.kotlin.JvmVirtualFileFinder;
+import org.jetbrains.kotlin.load.kotlin.VirtualFileFinder;
 import org.jetbrains.kotlin.name.ClassId;
 import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
@@ -52,6 +52,7 @@ import org.jetbrains.kotlin.util.OperatorNameConventions;
 import org.jetbrains.org.objectweb.asm.*;
 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
 import org.jetbrains.org.objectweb.asm.tree.*;
+import org.jetbrains.org.objectweb.asm.util.Printer;
 import org.jetbrains.org.objectweb.asm.util.Textifier;
 import org.jetbrains.org.objectweb.asm.util.TraceMethodVisitor;
 
@@ -92,8 +93,7 @@ public class InlineCodegenUtil {
             byte[] classData,
             final String methodName,
             final String methodDescriptor,
-            ClassId classId,
-            final @NotNull GenerationState state
+            ClassId classId
     ) {
         ClassReader cr = new ClassReader(classData);
         final MethodNode[] node = new MethodNode[1];
@@ -103,10 +103,6 @@ public class InlineCodegenUtil {
         lines[1] = Integer.MIN_VALUE;
         //noinspection PointlessBitwiseExpression
         cr.accept(new ClassVisitor(API) {
-            @Override
-            public void visit(int version, int access, @NotNull String name, String signature, String superName, String[] interfaces) {
-                assertVersionNotGreaterThanGeneratedOne(version, name, state);
-            }
 
             @Override
             public void visitSource(String source, String debug) {
@@ -151,16 +147,6 @@ public class InlineCodegenUtil {
         return new SMAPAndMethodNode(node[0], smap);
     }
 
-    public static void assertVersionNotGreaterThanGeneratedOne(int version, String internalName, @NotNull GenerationState state) {
-        // TODO: report a proper diagnostic
-        if (version > state.getClassFileVersion() && !"true".equals(System.getProperty("kotlin.skip.bytecode.version.check"))) {
-            throw new UnsupportedOperationException(
-                    "Cannot inline bytecode of class " + internalName + " which has version " + version + ". " +
-                    "This compiler can only inline Java 1.6 bytecode (version " + Opcodes.V1_6 + ")"
-            );
-        }
-    }
-
     public static void initDefaultSourceMappingIfNeeded(
             @NotNull CodegenContext context, @NotNull MemberCodegen codegen, @NotNull GenerationState state
     ) {
@@ -179,7 +165,7 @@ public class InlineCodegenUtil {
 
     @Nullable
     public static VirtualFile findVirtualFile(@NotNull GenerationState state, @NotNull ClassId classId) {
-        return JvmVirtualFileFinder.SERVICE.getInstance(state.getProject()).findVirtualFileWithHeader(classId);
+        return VirtualFileFinder.SERVICE.getInstance(state.getProject()).findVirtualFileWithHeader(classId);
     }
 
     @Nullable
@@ -405,6 +391,11 @@ public class InlineCodegenUtil {
         return sw.toString().trim();
     }
 
+    @NotNull
+    public static String getInsnOpcodeText(@Nullable AbstractInsnNode node) {
+        return node == null ? "null" : Printer.OPCODES[node.getOpcode()];
+    }
+
     @NotNull
     /* package */ static ClassReader buildClassReaderByInternalName(@NotNull GenerationState state, @NotNull String internalName) {
         //try to find just compiled classes then in dependencies

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/MethodInliner.java

@@ -252,6 +252,7 @@ public class MethodInliner {
                     //TODO add skipped this and receiver
                     InlineResult lambdaResult = inliner.doInline(this.mv, remapper, true, info, invokeCall.finallyDepthShift);
                     result.mergeWithNotChangeInfo(lambdaResult);
+                    result.getReifiedTypeParametersUsages().mergeAll(lambdaResult.getReifiedTypeParametersUsages());
 
                     //return value boxing/unboxing
                     Method bridge = typeMapper.mapAsmMethod(ClosureCodegen.getErasedInvokeFunction(info.getFunctionDescriptor()));
@@ -486,6 +487,11 @@ public class MethodInliner {
                         );
                         awaitClassReification = false;
                     }
+                    else if (inliningContext.isInliningLambda && ReifiedTypeInliner.Companion.isOperationReifiedMarker(cur)) {
+                        ReificationArgument reificationArgument = ReifiedTypeInlinerKt.getReificationArgument((MethodInsnNode) cur);
+                        String parameterName = reificationArgument.getParameterName();
+                        result.getReifiedTypeParametersUsages().addUsedReifiedParameter(parameterName);
+                    }
                 }
                 else if (cur.getOpcode() == Opcodes.GETSTATIC) {
                     FieldInsnNode fieldInsnNode = (FieldInsnNode) cur;

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/ObjectTransformer.kt

@@ -66,7 +66,6 @@ class WhenMappingTransformer(
         val fieldNode = transformationInfo.fieldNode
         classReader.accept(object : ClassVisitor(InlineCodegenUtil.API, classBuilder.visitor) {
             override fun visit(version: Int, access: Int, name: String, signature: String?, superName: String, interfaces: Array<String>) {
-                InlineCodegenUtil.assertVersionNotGreaterThanGeneratedOne(version, name, state)
                 classBuilder.defineClass(null, version, access, name, signature, superName, interfaces)
             }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/Parameters.kt

@@ -70,7 +70,5 @@ internal class Parameters(val parameters: List<ParameterInfo>) : Iterable<Parame
     }
 
     val capturedTypes: List<Type>
-        get() = captured.map {
-            it.getType()
-        }
+        get() = captured.map(CapturedParamInfo::getType)
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/ReifiedTypeInliner.kt

@@ -70,7 +70,7 @@ class ReifiedTypeInliner(private val parametersMapping: TypeParameterMappings?)
         const val REIFIED_OPERATION_MARKER_METHOD_NAME = "reifiedOperationMarker"
         const val NEED_CLASS_REIFICATION_MARKER_METHOD_NAME = "needClassReification"
 
-        private fun isOperationReifiedMarker(insn: AbstractInsnNode) =
+        fun isOperationReifiedMarker(insn: AbstractInsnNode) =
                 isReifiedMarker(insn) { it == REIFIED_OPERATION_MARKER_METHOD_NAME }
 
         private fun isReifiedMarker(insn: AbstractInsnNode, namePredicate: (String) -> Boolean): Boolean {
@@ -247,7 +247,7 @@ class ReifiedTypeInliner(private val parametersMapping: TypeParameterMappings?)
     }
 }
 
-private val MethodInsnNode.reificationArgument: ReificationArgument?
+val MethodInsnNode.reificationArgument: ReificationArgument?
     get() {
         val prev = previous!!
 

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/SMAP.kt

@@ -57,7 +57,7 @@ class SMAPBuilder(
     private fun generateDebugStrata(realMappings: List<FileMapping>): String {
         val combinedMapping = FileMapping(source, path)
         realMappings.forEach { fileMapping ->
-            fileMapping.lineMappings.filter { it.callSiteMarker != null }.forEach { (source, dest, range, callSiteMarker) ->
+            fileMapping.lineMappings.filter { it.callSiteMarker != null }.forEach { (_, dest, range, callSiteMarker) ->
                 combinedMapping.addRangeMapping(RangeMapping(
                         callSiteMarker!!.lineNumber, dest, range
                 ))

compiler/backend/src/org/jetbrains/kotlin/codegen/intrinsics/IntrinsicArrayConstructors.kt

@@ -28,7 +28,7 @@ internal val classId: ClassId =
         ClassId.topLevel(FqName("org.jetbrains.kotlin.codegen.intrinsics.IntrinsicArrayConstructorsKt"))
 
 internal val bytecode: ByteArray by lazy {
-    val stream = object {}.javaClass.classLoader.getResourceAsStream("${classId.asString()}.class")
+    val stream = object {}::class.java.classLoader.getResourceAsStream("${classId.asString()}.class")
     stream.readBytes().apply {
         stream.close()
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/intrinsics/JavaClassProperty.kt

@@ -58,7 +58,7 @@ object JavaClassProperty : IntrinsicPropertyGetter() {
     }
 
     override fun toCallable(fd: FunctionDescriptor, isSuper: Boolean, resolvedCall: ResolvedCall<*>, codegen: ExpressionCodegen): Callable {
-        val classType = codegen.getState().typeMapper.mapType(resolvedCall.call.dispatchReceiver!!.type)
+        val classType = codegen.state.typeMapper.mapType(resolvedCall.call.dispatchReceiver!!.type)
         return object : IntrinsicCallable(getType(Class::class.java), listOf(), classType, null) {
             override fun invokeIntrinsic(v: InstructionAdapter) {
                 if (isPrimitive(classType)) {

compiler/backend/src/org/jetbrains/kotlin/codegen/intrinsics/NewArray.kt

@@ -26,7 +26,7 @@ import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
 class NewArray : IntrinsicMethod() {
     override fun toCallable(fd: FunctionDescriptor, isSuper: Boolean, resolvedCall: ResolvedCall<*>, codegen: ExpressionCodegen): Callable {
         val jetType = resolvedCall.resultingDescriptor.returnType!!
-        val type = codegen.getState().typeMapper.mapType(jetType)
+        val type = codegen.state.typeMapper.mapType(jetType)
         return object : IntrinsicCallable(type, listOf(Type.INT_TYPE), null, null) {
             override fun invokeIntrinsic(v: InstructionAdapter) {
                 codegen.newArrayInstruction(jetType)

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/DeadCodeEliminationMethodTransformer.kt

@@ -29,9 +29,13 @@ class DeadCodeEliminationMethodTransformer : MethodTransformer() {
     }
 
     fun transformWithResult(internalClassName: String, methodNode: MethodNode): Result {
+        val frames = analyze(internalClassName, methodNode, OptimizationBasicInterpreter())
+        return removeDeadCodeByFrames(methodNode, frames)
+    }
+
+    fun removeDeadCodeByFrames(methodNode: MethodNode, frames: Array<out Any?>): Result {
         val removedNodes = HashSet<AbstractInsnNode>()
 
-        val frames = analyze(internalClassName, methodNode, OptimizationBasicInterpreter())
         val insnList = methodNode.instructions
         val insnsArray = insnList.toArray()
 
@@ -51,6 +55,7 @@ class DeadCodeEliminationMethodTransformer : MethodTransformer() {
     }
 
     class Result(val removedNodes: Set<AbstractInsnNode>) {
+        fun hasRemovedAnything() = removedNodes.isNotEmpty()
         fun isRemoved(node: AbstractInsnNode) = removedNodes.contains(node)
         fun isAlive(node: AbstractInsnNode) = !isRemoved(node)
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/OptimizationMethodVisitor.java

@@ -21,8 +21,9 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.codegen.TransformationMethodVisitor;
 import org.jetbrains.kotlin.codegen.optimization.boxing.RedundantBoxingMethodTransformer;
 import org.jetbrains.kotlin.codegen.optimization.boxing.RedundantCoercionToUnitTransformer;
-import org.jetbrains.kotlin.codegen.optimization.boxing.RedundantNullCheckMethodTransformer;
+import org.jetbrains.kotlin.codegen.optimization.captured.CapturedVarsOptimizationMethodTransformer;
 import org.jetbrains.kotlin.codegen.optimization.common.UtilKt;
+import org.jetbrains.kotlin.codegen.optimization.nullCheck.RedundantNullCheckV2MethodTransformer;
 import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer;
 import org.jetbrains.org.objectweb.asm.MethodVisitor;
 import org.jetbrains.org.objectweb.asm.tree.MethodNode;
@@ -33,7 +34,9 @@ public class OptimizationMethodVisitor extends TransformationMethodVisitor {
     private static final MethodTransformer MANDATORY_METHOD_TRANSFORMER = new FixStackWithLabelNormalizationMethodTransformer();
 
     private static final MethodTransformer[] OPTIMIZATION_TRANSFORMERS = new MethodTransformer[] {
-            new RedundantNullCheckMethodTransformer(),
+            new CapturedVarsOptimizationMethodTransformer(),
+            new RedundantNullCheckV2MethodTransformer(),
+            new RedundantCheckCastEliminationMethodTransformer(),
             new RedundantBoxingMethodTransformer(),
             new RedundantCoercionToUnitTransformer(),
             new DeadCodeEliminationMethodTransformer(),

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/RedundantCheckCastElimination.kt

@@ -0,0 +1,60 @@
+/*
+ * 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.codegen.optimization
+
+import org.jetbrains.kotlin.codegen.inline.ReifiedTypeInliner
+import org.jetbrains.kotlin.codegen.optimization.common.OptimizationBasicInterpreter
+import org.jetbrains.kotlin.codegen.optimization.fixStack.top
+import org.jetbrains.kotlin.codegen.optimization.nullCheck.popReferenceValueBefore
+import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer
+import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.kotlin.utils.addToStdlib.cast
+import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.tree.*
+
+class RedundantCheckCastEliminationMethodTransformer : MethodTransformer() {
+    override fun transform(internalClassName: String, methodNode: MethodNode) {
+        val insns = methodNode.instructions.toArray()
+        if (!insns.any { it.opcode == Opcodes.CHECKCAST }) return
+
+        val redundantCheckCasts = ArrayList<TypeInsnNode>()
+
+        val frames = analyze(internalClassName, methodNode, OptimizationBasicInterpreter())
+        for (i in insns.indices) {
+            val valueType = frames[i]?.top()?.type ?: continue
+            val insn = insns[i]
+            if (ReifiedTypeInliner.isOperationReifiedMarker(insn.previous)) continue
+
+            if (insn is TypeInsnNode) {
+                val insnType = Type.getObjectType(insn.desc)
+                if (!isTrivialSubtype(insnType, valueType)) continue
+
+                if (insn.opcode == Opcodes.CHECKCAST) {
+                    redundantCheckCasts.add(insn)
+                }
+            }
+        }
+
+        redundantCheckCasts.forEach {
+            methodNode.instructions.remove(it)
+        }
+    }
+
+    private fun isTrivialSubtype(superType: Type, subType: Type) =
+            superType == subType
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/BoxedBasicValue.kt

@@ -20,7 +20,6 @@ import com.intellij.openapi.util.Pair
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue
 import org.jetbrains.kotlin.resolve.jvm.AsmTypes
-import org.jetbrains.kotlin.utils.toReadOnlyList
 import org.jetbrains.org.objectweb.asm.Type
 import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode
 import java.util.*
@@ -66,7 +65,7 @@ class BoxedValueDescriptor(
     var isSafeToRemove = true; private set
     val unboxedType: Type = getUnboxedType(boxedType)
 
-    fun getAssociatedInsns() = associatedInsns.toReadOnlyList()
+    fun getAssociatedInsns() = associatedInsns.toList()
 
     fun addInsn(insnNode: AbstractInsnNode) {
         associatedInsns.add(insnNode)

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/BoxingInterpreter.kt

@@ -35,14 +35,12 @@ import java.util.*
 open class BoxingInterpreter(private val insnList: InsnList) : OptimizationBasicInterpreter() {
     private val boxingPlaces = HashMap<Int, BoxedBasicValue>()
 
-    protected open fun createNewBoxing(insn: AbstractInsnNode, type: Type, progressionIterator: ProgressionIteratorBasicValue?): BasicValue {
-        val index = insnList.indexOf(insn)
-        return boxingPlaces.getOrPut(index) {
-            val boxedBasicValue = CleanBoxedValue(type, insn, progressionIterator)
-            onNewBoxedValue(boxedBasicValue)
-            boxedBasicValue
-        }
-    }
+    protected open fun createNewBoxing(insn: AbstractInsnNode, type: Type, progressionIterator: ProgressionIteratorBasicValue?): BasicValue =
+            boxingPlaces.getOrPut(insnList.indexOf(insn)) {
+                val boxedBasicValue = CleanBoxedValue(type, insn, progressionIterator)
+                onNewBoxedValue(boxedBasicValue)
+                boxedBasicValue
+            }
 
     protected fun checkUsedValue(value: BasicValue) {
         if (value is TaintedBoxedValue) {
@@ -66,14 +64,17 @@ open class BoxingInterpreter(private val insnList: InsnList) : OptimizationBasic
                 onUnboxing(insn, firstArg, value.type)
                 value
             }
-            insn.isIteratorMethodCallOfProgression(values) -> {
-                ProgressionIteratorBasicValue(getValuesTypeOfProgressionClass(firstArg.type.internalName))
-            }
+            insn.isIteratorMethodCallOfProgression(values) ->
+                ProgressionIteratorBasicValue.byProgressionClassType(firstArg.type)
             insn.isNextMethodCallOfProgressionIterator(values) -> {
                 val progressionIterator = firstArg as? ProgressionIteratorBasicValue
                                           ?: throw AssertionError("firstArg should be progression iterator")
                 createNewBoxing(insn, AsmUtil.boxType(progressionIterator.valuesPrimitiveType), progressionIterator)
             }
+            insn.isAreEqualIntrinsicForSameTypedBoxedValues(values) && canValuesBeUnboxedForAreEqual(values) -> {
+                onAreEqual(insn, values[0] as BoxedBasicValue, values[1] as BoxedBasicValue)
+                value
+            }
             else -> {
                 // N-ary operation should be a method call or multinewarray.
                 // Arguments for multinewarray could be only numeric,
@@ -100,7 +101,7 @@ open class BoxingInterpreter(private val insnList: InsnList) : OptimizationBasic
     protected open fun isExactValue(value: BasicValue) =
             value is ProgressionIteratorBasicValue ||
             value is CleanBoxedValue ||
-            value.type != null && isProgressionClass(value.type.internalName)
+            value.type != null && isProgressionClass(value.type)
 
     override fun merge(v: BasicValue, w: BasicValue) =
             when {
@@ -125,6 +126,7 @@ open class BoxingInterpreter(private val insnList: InsnList) : OptimizationBasic
 
     protected open fun onNewBoxedValue(value: BoxedBasicValue) {}
     protected open fun onUnboxing(insn: AbstractInsnNode, value: BoxedBasicValue, resultType: Type) {}
+    protected open fun onAreEqual(insn: AbstractInsnNode, value1: BoxedBasicValue, value2: BoxedBasicValue) {}
     protected open fun onMethodCallWithBoxedValue(value: BoxedBasicValue) {}
     protected open fun onMergeFail(value: BoxedBasicValue) {}
     protected open fun onMergeSuccess(v: BoxedBasicValue, w: BoxedBasicValue) {}
@@ -190,23 +192,44 @@ private fun AbstractInsnNode.isJavaLangClassBoxing() =
             desc == JLCLASS_TO_KCLASS
         }
 
-private fun AbstractInsnNode.isNextMethodCallOfProgressionIterator(values: List<BasicValue>) =
-        values[0] is ProgressionIteratorBasicValue &&
+fun AbstractInsnNode.isNextMethodCallOfProgressionIterator(values: List<BasicValue>) =
+        values.firstOrNull() is ProgressionIteratorBasicValue &&
         isMethodInsnWith(Opcodes.INVOKEINTERFACE) {
             name == "next"
         }
 
-private fun AbstractInsnNode.isIteratorMethodCallOfProgression(values: List<BasicValue>) =
+fun AbstractInsnNode.isIteratorMethodCallOfProgression(values: List<BasicValue>) =
         isMethodInsnWith(Opcodes.INVOKEINTERFACE) {
-            val firstArgType = values[0].type
+            val firstArgType = values.firstOrNull()?.type
             firstArgType != null &&
-            isProgressionClass(firstArgType.internalName) &&
+            isProgressionClass(firstArgType) &&
             name == "iterator"
         }
 
-private fun isProgressionClass(internalClassName: String) =
-        RangeCodegenUtil.isRangeOrProgression(buildFqNameByInternal(internalClassName))
+fun isProgressionClass(type: Type) =
+        RangeCodegenUtil.isRangeOrProgression(buildFqNameByInternal(type.internalName))
 
-private fun getValuesTypeOfProgressionClass(progressionClassInternalName: String) =
-        RangeCodegenUtil.getPrimitiveRangeOrProgressionElementType(buildFqNameByInternal(progressionClassInternalName))
-                ?.typeName?.asString() ?: error("type should be not null")
+fun AbstractInsnNode.isAreEqualIntrinsicForSameTypedBoxedValues(values: List<BasicValue>) =
+        isAreEqualIntrinsic() && run {
+            if (values.size != 2) return false
+
+            val (v1, v2) = values
+            if (v1 !is BoxedBasicValue || v2 !is BoxedBasicValue) return false
+
+            val d1 = v1.descriptor
+            val d2 = v2.descriptor
+            d1.unboxedType == d2.unboxedType
+        }
+
+fun AbstractInsnNode.isAreEqualIntrinsic() =
+        isMethodInsnWith(Opcodes.INVOKESTATIC) {
+            name == "areEqual" &&
+            owner == "kotlin/jvm/internal/Intrinsics" &&
+            desc == "(Ljava/lang/Object;Ljava/lang/Object;)Z"
+        }
+
+fun canValuesBeUnboxedForAreEqual(values: List<BasicValue>): Boolean =
+        !values.any {
+            val unboxedType = getUnboxedType(it.type)
+            unboxedType == Type.DOUBLE_TYPE || unboxedType == Type.FLOAT_TYPE
+        }

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/NullabilityInterpreter.kt

@@ -1,53 +0,0 @@
-/*
- * Copyright 2010-2014 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.codegen.optimization.boxing
-
-import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue
-import org.jetbrains.org.objectweb.asm.Opcodes
-import org.jetbrains.org.objectweb.asm.Type
-import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode
-import org.jetbrains.org.objectweb.asm.tree.InsnList
-import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue
-
-class NullabilityInterpreter(insns: InsnList) : BoxingInterpreter(insns) {
-    override fun unaryOperation(insn: AbstractInsnNode, value: BasicValue) = makeNotNullIfNeeded(insn, super.unaryOperation(insn, value))
-
-    override fun newOperation(insn: AbstractInsnNode) = makeNotNullIfNeeded(insn, super.newOperation(insn))
-
-    override fun isExactValue(value: BasicValue) = super.isExactValue(value) || value is NotNullBasicValue
-
-    override fun createNewBoxing(insn: AbstractInsnNode, type: Type, progressionIterator: ProgressionIteratorBasicValue?) =
-            NotNullBasicValue(type)
-}
-
-private fun makeNotNullIfNeeded(insn: AbstractInsnNode, value: BasicValue?): BasicValue? =
-    when (insn.opcode) {
-        Opcodes.ANEWARRAY, Opcodes.NEWARRAY, Opcodes.LDC, Opcodes.NEW ->
-            if (value?.type?.sort == Type.OBJECT || value?.type?.sort == Type.ARRAY)
-                NotNullBasicValue(value.type)
-            else
-                value
-
-        else -> value
-    }
-
-class NotNullBasicValue(type: Type?) : StrictBasicValue(type) {
-    override fun equals(other: Any?): Boolean = other is NotNullBasicValue
-    // We do not differ not-nullable values, so we should always return the same hashCode
-    // Actually it doesn't really matter because analyzer is not supposed to store values in hashtables
-    override fun hashCode() = 0
-}

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/ProgressionIteratorBasicValue.java

@@ -18,17 +18,18 @@ package org.jetbrains.kotlin.codegen.optimization.boxing;
 
 import com.google.common.collect.ImmutableMap;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.builtins.PrimitiveType;
 import org.jetbrains.kotlin.codegen.RangeCodegenUtil;
 import org.jetbrains.kotlin.codegen.intrinsics.IteratorNext;
 import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue;
+import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType;
 import org.jetbrains.org.objectweb.asm.Type;
 
 public class ProgressionIteratorBasicValue extends StrictBasicValue {
     private final static ImmutableMap<String, Type> VALUES_TYPENAME_TO_TYPE;
-
     static {
         ImmutableMap.Builder<String, Type> builder = ImmutableMap.builder();
         for (PrimitiveType primitiveType : RangeCodegenUtil.supportedRangeTypes()) {
@@ -37,6 +38,15 @@ public class ProgressionIteratorBasicValue extends StrictBasicValue {
         VALUES_TYPENAME_TO_TYPE = builder.build();
     }
 
+    private static final ImmutableMap<PrimitiveType, ProgressionIteratorBasicValue> ITERATOR_VALUE_BY_ELEMENT_PRIMITIVE_TYPE;
+    static {
+        ImmutableMap.Builder<PrimitiveType, ProgressionIteratorBasicValue> builder = ImmutableMap.builder();
+        for (PrimitiveType elementType : RangeCodegenUtil.supportedRangeTypes()) {
+            builder.put(elementType, new ProgressionIteratorBasicValue(elementType.getTypeName().asString()));
+        }
+        ITERATOR_VALUE_BY_ELEMENT_PRIMITIVE_TYPE = builder.build();
+    }
+
     @NotNull
     private static Type getValuesType(@NotNull String valuesTypeName) {
         Type type = VALUES_TYPENAME_TO_TYPE.get(valuesTypeName);
@@ -47,12 +57,20 @@ public class ProgressionIteratorBasicValue extends StrictBasicValue {
     private final Type valuesPrimitiveType;
     private final String valuesPrimitiveTypeName;
 
-    public ProgressionIteratorBasicValue(@NotNull String valuesPrimitiveTypeName) {
+    private ProgressionIteratorBasicValue(@NotNull String valuesPrimitiveTypeName) {
         super(IteratorNext.Companion.getPrimitiveIteratorType(Name.identifier(valuesPrimitiveTypeName)));
         this.valuesPrimitiveType = getValuesType(valuesPrimitiveTypeName);
         this.valuesPrimitiveTypeName = valuesPrimitiveTypeName;
     }
 
+
+    @Nullable
+    public static ProgressionIteratorBasicValue byProgressionClassType(@NotNull Type progressionClassType) {
+        FqName classFqName = new FqName(progressionClassType.getClassName());
+        PrimitiveType elementType = RangeCodegenUtil.getPrimitiveRangeOrProgressionElementType(classFqName);
+        return ITERATOR_VALUE_BY_ELEMENT_PRIMITIVE_TYPE.get(elementType);
+    }
+
     @NotNull
     public Type getValuesPrimitiveType() {
         return valuesPrimitiveType;

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/RedundantBoxingInterpreter.kt

@@ -84,6 +84,13 @@ internal class RedundantBoxingInterpreter(insnList: InsnList) : BoxingInterprete
         }
     }
 
+    override fun onAreEqual(insn: AbstractInsnNode, value1: BoxedBasicValue, value2: BoxedBasicValue) {
+        val descriptor1 = value1.descriptor
+        val descriptor2 = value2.descriptor
+        candidatesBoxedValues.merge(descriptor1, descriptor2)
+        descriptor1.addInsn(insn)
+    }
+
     override fun onMethodCallWithBoxedValue(value: BoxedBasicValue) {
         markValueAsDirty(value)
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/RedundantBoxingMethodTransformer.java

@@ -21,7 +21,9 @@ import kotlin.collections.CollectionsKt;
 import kotlin.jvm.functions.Function1;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue;
+import org.jetbrains.kotlin.codegen.optimization.common.UtilKt;
 import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer;
+import org.jetbrains.org.objectweb.asm.Label;
 import org.jetbrains.org.objectweb.asm.Opcodes;
 import org.jetbrains.org.objectweb.asm.Type;
 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
@@ -48,7 +50,7 @@ public class RedundantBoxingMethodTransformer extends MethodTransformer {
 
             adaptLocalVariableTableForBoxedValues(node, frames);
 
-            applyVariablesRemapping(node, buildVariablesRemapping(valuesToOptimize, node));
+            UtilKt.remapLocalVariables(node, buildVariablesRemapping(valuesToOptimize, node));
 
             adaptInstructionsForBoxedValues(node, valuesToOptimize);
         }
@@ -221,21 +223,6 @@ public class RedundantBoxingMethodTransformer extends MethodTransformer {
         return remapping;
     }
 
-    private static void applyVariablesRemapping(@NotNull MethodNode node, @NotNull int[] remapping) {
-        for (AbstractInsnNode insn : node.instructions.toArray()) {
-            if (insn instanceof VarInsnNode) {
-                ((VarInsnNode) insn).var = remapping[((VarInsnNode) insn).var];
-            }
-            if (insn instanceof IincInsnNode) {
-                ((IincInsnNode) insn).var = remapping[((IincInsnNode) insn).var];
-            }
-        }
-
-        for (LocalVariableNode localVariableNode : node.localVariables) {
-            localVariableNode.index = remapping[localVariableNode.index];
-        }
-    }
-
     private static void adaptInstructionsForBoxedValues(
             @NotNull MethodNode node,
             @NotNull RedundantBoxedValuesCollection values
@@ -341,9 +328,68 @@ public class RedundantBoxingMethodTransformer extends MethodTransformer {
                 );
                 node.instructions.set(insn, new InsnNode(Opcodes.ICONST_1));
                 break;
+            case Opcodes.INVOKESTATIC:
+                if (BoxingInterpreterKt.isAreEqualIntrinsic(insn)) {
+                    adaptAreEqualIntrinsic(node, insn, value);
+                    break;
+                }
+                else {
+                    // fall-through to default
+                }
             default:
                 // CHECKCAST or unboxing-method call
                 node.instructions.remove(insn);
         }
     }
+
+    private static void adaptAreEqualIntrinsic(@NotNull MethodNode node, @NotNull AbstractInsnNode insn, @NotNull BoxedValueDescriptor value) {
+        Type unboxedType = value.getUnboxedType();
+
+        switch (unboxedType.getSort()) {
+            case Type.BOOLEAN:
+            case Type.BYTE:
+            case Type.SHORT:
+            case Type.INT:
+            case Type.CHAR:
+                adaptAreEqualIntrinsicForInt(node, insn);
+                break;
+            case Type.LONG:
+                adaptAreEqualIntrinsicForLong(node, insn);
+                break;
+            case Type.OBJECT:
+                break;
+            default:
+                throw new AssertionError("Unexpected unboxed type kind: " + unboxedType);
+        }
+    }
+
+    private static void adaptAreEqualIntrinsicForInt(@NotNull MethodNode node, @NotNull AbstractInsnNode insn) {
+        LabelNode lNotEqual = new LabelNode(new Label());
+        LabelNode lDone = new LabelNode(new Label());
+        node.instructions.insertBefore(insn, new JumpInsnNode(Opcodes.IF_ICMPNE, lNotEqual));
+        node.instructions.insertBefore(insn, new InsnNode(Opcodes.ICONST_1));
+        node.instructions.insertBefore(insn, new JumpInsnNode(Opcodes.GOTO, lDone));
+        node.instructions.insertBefore(insn, lNotEqual);
+        node.instructions.insertBefore(insn, new InsnNode(Opcodes.ICONST_0));
+        node.instructions.insertBefore(insn, lDone);
+
+        node.instructions.remove(insn);
+    }
+
+    private static void adaptAreEqualIntrinsicForLong(@NotNull MethodNode node, @NotNull AbstractInsnNode insn) {
+        node.instructions.insertBefore(insn, new InsnNode(Opcodes.LCMP));
+        ifEqual1Else0(node, insn);
+        node.instructions.remove(insn);
+    }
+
+    private static void ifEqual1Else0(@NotNull MethodNode node, @NotNull AbstractInsnNode insn) {
+        LabelNode lNotEqual = new LabelNode(new Label());
+        LabelNode lDone = new LabelNode(new Label());
+        node.instructions.insertBefore(insn, new JumpInsnNode(Opcodes.IFNE, lNotEqual));
+        node.instructions.insertBefore(insn, new InsnNode(Opcodes.ICONST_1));
+        node.instructions.insertBefore(insn, new JumpInsnNode(Opcodes.GOTO, lDone));
+        node.instructions.insertBefore(insn, lNotEqual);
+        node.instructions.insertBefore(insn, new InsnNode(Opcodes.ICONST_0));
+        node.instructions.insertBefore(insn, lDone);
+    }
 }

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/RedundantCoercionToUnitTransformer.kt

@@ -63,7 +63,7 @@ class RedundantCoercionToUnitTransformer : MethodTransformer() {
         private val frames by lazy { analyzeMethodBody() }
 
         fun transform() {
-            if (!insns.any { it.isUnitOrNull() }) return
+            if (!insns.any { it.isUnitInstanceOrNull() }) return
 
             computeTransformations()
             for ((insn, transformation) in transformations.entries) {
@@ -158,7 +158,7 @@ class RedundantCoercionToUnitTransformer : MethodTransformer() {
                     transformations[insn] = replaceWithPopTransformation(boxedValueSize)
                 }
 
-                insn.isUnitOrNull() -> {
+                insn.isUnitInstanceOrNull() -> {
                     transformations[insn] = replaceWithNopTransformation()
                 }
 
@@ -232,7 +232,7 @@ class RedundantCoercionToUnitTransformer : MethodTransformer() {
                 it.isPrimitiveBoxing() && (it as MethodInsnNode).owner == resultType
 
         private fun isTransformablePopOperand(insn: AbstractInsnNode) =
-                insn.opcode == Opcodes.CHECKCAST || insn.isPrimitiveBoxing() || insn.isUnitOrNull()
+                insn.opcode == Opcodes.CHECKCAST || insn.isPrimitiveBoxing() || insn.isUnitInstanceOrNull()
 
         private fun isDontTouch(insn: AbstractInsnNode) =
                 dontTouchInsnIndices[insnList.indexOf(insn)]
@@ -240,6 +240,9 @@ class RedundantCoercionToUnitTransformer : MethodTransformer() {
 
 }
 
-fun AbstractInsnNode.isUnitOrNull() =
-        opcode == Opcodes.ACONST_NULL ||
-        opcode == Opcodes.GETSTATIC && this is FieldInsnNode && owner == "kotlin/Unit" && name == "INSTANCE"
+fun AbstractInsnNode.isUnitInstanceOrNull() =
+        opcode == Opcodes.ACONST_NULL || isUnitInstance()
+
+fun AbstractInsnNode.isUnitInstance() =
+        opcode == Opcodes.GETSTATIC &&
+        this is FieldInsnNode && owner == "kotlin/Unit" && name == "INSTANCE"

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/boxing/RedundantNullCheckMethodTransformer.java

@@ -1,81 +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.codegen.optimization.boxing;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer;
-import org.jetbrains.org.objectweb.asm.Opcodes;
-import org.jetbrains.org.objectweb.asm.tree.*;
-import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue;
-import org.jetbrains.org.objectweb.asm.tree.analysis.Frame;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class RedundantNullCheckMethodTransformer extends MethodTransformer {
-
-    @Override
-    public void transform(@NotNull String internalClassName, @NotNull MethodNode methodNode) {
-        while (removeRedundantNullCheckPass(internalClassName, methodNode)) {
-            //do nothing
-        }
-    }
-
-    private static boolean removeRedundantNullCheckPass(@NotNull String internalClassName, @NotNull MethodNode methodNode) {
-        InsnList insnList = methodNode.instructions;
-        Frame<BasicValue>[] frames = analyze(
-                internalClassName, methodNode,
-                new NullabilityInterpreter(insnList)
-        );
-
-        List<AbstractInsnNode> insnsToOptimize = new ArrayList<AbstractInsnNode>();
-
-        for (int i = 0; i < insnList.size(); i++) {
-            Frame<BasicValue> frame = frames[i];
-            AbstractInsnNode insn = insnList.get(i);
-
-            if ((insn.getOpcode() == Opcodes.IFNULL || insn.getOpcode() == Opcodes.IFNONNULL) &&
-                frame != null && frame.getStack(frame.getStackSize() - 1) instanceof NotNullBasicValue) {
-                insnsToOptimize.add(insn);
-            }
-        }
-
-        for (AbstractInsnNode insn : insnsToOptimize) {
-            if (insn.getPrevious() != null && insn.getPrevious().getOpcode() == Opcodes.DUP) {
-                insnList.remove(insn.getPrevious());
-            }
-            else {
-                insnList.insertBefore(insn, new InsnNode(Opcodes.POP));
-            }
-
-            assert insn.getOpcode() == Opcodes.IFNULL
-                   || insn.getOpcode() == Opcodes.IFNONNULL : "only IFNULL/IFNONNULL are supported";
-
-            if (insn.getOpcode() == Opcodes.IFNULL) {
-                insnList.remove(insn);
-            }
-            else {
-                insnList.set(
-                        insn,
-                        new JumpInsnNode(Opcodes.GOTO, ((JumpInsnNode) insn).label)
-                );
-            }
-        }
-
-        return insnsToOptimize.size() > 0;
-    }
-}

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/captured/CapturedVarsOptimizationMethodTransformer.kt

@@ -0,0 +1,264 @@
+/*
+ * 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.codegen.optimization.captured
+
+import org.jetbrains.kotlin.builtins.PrimitiveType
+import org.jetbrains.kotlin.codegen.optimization.common.removeEmptyCatchBlocks
+import org.jetbrains.kotlin.codegen.optimization.common.removeUnusedLocalVariables
+import org.jetbrains.kotlin.codegen.optimization.fixStack.peek
+import org.jetbrains.kotlin.codegen.optimization.fixStack.top
+import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer
+import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs
+import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.tree.*
+import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue
+import org.jetbrains.org.objectweb.asm.tree.analysis.Frame
+
+class CapturedVarsOptimizationMethodTransformer : MethodTransformer() {
+    override fun transform(internalClassName: String, methodNode: MethodNode) {
+        Transformer(internalClassName, methodNode).run()
+    }
+
+    // Tracks proper usages of objects corresponding to captured variables.
+    //
+    // The 'kotlin.jvm.internal.Ref.*' instance can be replaced with a local variable,
+    // if all of the following conditions are satisfied:
+    //  * It is created inside a current method.
+    //  * The only permitted operations on it are:
+    //      - store to a local variable
+    //      - ALOAD, ASTORE
+    //      - DUP, POP
+    //      - GETFIELD <owner>.element, PUTFIELD <owner>.element
+    //  * There's a corresponding local variable definition,
+    //      and all ALOAD/ASTORE instructions operate on that particular local variable.
+    //  * Its 'element' field is initialized at start of local variable visibility range.
+    //
+    // Note that for code that doesn't create Ref objects explicitly these conditions are true,
+    // unless the Ref object escapes to a local class constructor (including local classes for lambdas).
+    //
+    private class CapturedVarDescriptor(val newInsn: TypeInsnNode, val refType: Type, val valueType: Type) : ReferenceValueDescriptor {
+        var hazard = false
+
+        var initCallInsn: MethodInsnNode? = null
+        var localVar: LocalVariableNode? = null
+        var localVarIndex = -1
+        val astoreInsns: MutableCollection<VarInsnNode> = LinkedHashSet()
+        val aloadInsns: MutableCollection<VarInsnNode> = LinkedHashSet()
+        val stackInsns: MutableCollection<AbstractInsnNode> = LinkedHashSet()
+        val getFieldInsns: MutableCollection<FieldInsnNode> = LinkedHashSet()
+        val putFieldInsns: MutableCollection<FieldInsnNode> = LinkedHashSet()
+
+        fun canRewrite(): Boolean =
+                !hazard &&
+                initCallInsn != null &&
+                localVar != null &&
+                localVarIndex >= 0
+
+        override fun onUseAsTainted() {
+            hazard = true
+        }
+    }
+
+    private class Transformer(private val internalClassName: String, private val methodNode: MethodNode) {
+        private val refValues = ArrayList<CapturedVarDescriptor>()
+        private val refValuesByNewInsn = LinkedHashMap<TypeInsnNode, CapturedVarDescriptor>()
+        private val insns = methodNode.instructions.toArray()
+        private lateinit var frames: Array<out Frame<BasicValue>?>
+
+        val hasRewritableRefValues: Boolean
+            get() = refValues.isNotEmpty()
+
+        fun run() {
+            createRefValues()
+            if (!hasRewritableRefValues) return
+
+            analyze()
+            if (!hasRewritableRefValues) return
+
+            rewrite()
+        }
+
+        private fun AbstractInsnNode.getIndex() = methodNode.instructions.indexOf(this)
+
+        private fun createRefValues() {
+            for (insn in insns) {
+                if (insn.opcode == Opcodes.NEW && insn is TypeInsnNode) {
+                    val type = Type.getObjectType(insn.desc)
+                    if (AsmTypes.isSharedVarType(type)) {
+                        val valueType = REF_TYPE_TO_ELEMENT_TYPE[type.internalName] ?: continue
+                        val refValue = CapturedVarDescriptor(insn, type, valueType)
+                        refValues.add(refValue)
+                        refValuesByNewInsn[insn] = refValue
+                    }
+                }
+            }
+        }
+
+        private inner class Interpreter : ReferenceTrackingInterpreter() {
+            override fun newOperation(insn: AbstractInsnNode): BasicValue =
+                    refValuesByNewInsn[insn]?.let { descriptor ->
+                        ProperTrackedReferenceValue(descriptor.refType, descriptor)
+                    }
+                    ?: super.newOperation(insn)
+
+            override fun processRefValueUsage(value: TrackedReferenceValue, insn: AbstractInsnNode, position: Int) {
+                for (descriptor in value.descriptors) {
+                    if (descriptor !is CapturedVarDescriptor) throw AssertionError("Unexpected descriptor: $descriptor")
+                    when {
+                        insn.opcode == Opcodes.ALOAD ->
+                            descriptor.aloadInsns.add(insn as VarInsnNode)
+                        insn.opcode == Opcodes.ASTORE ->
+                            descriptor.astoreInsns.add(insn as VarInsnNode)
+                        insn.opcode == Opcodes.GETFIELD && insn is FieldInsnNode && insn.name == REF_ELEMENT_FIELD && position == 0 ->
+                            descriptor.getFieldInsns.add(insn)
+                        insn.opcode == Opcodes.PUTFIELD && insn is FieldInsnNode && insn.name == REF_ELEMENT_FIELD && position == 0 ->
+                            descriptor.putFieldInsns.add(insn)
+                        insn.opcode == Opcodes.INVOKESPECIAL && insn is MethodInsnNode && insn.name == INIT_METHOD_NAME && position == 0 ->
+                            if (descriptor.initCallInsn != null && descriptor.initCallInsn != insn)
+                                descriptor.hazard = true
+                            else
+                                descriptor.initCallInsn = insn
+                        insn.opcode == Opcodes.DUP ->
+                            descriptor.stackInsns.add(insn)
+                        else ->
+                            descriptor.hazard = true
+                    }
+                }
+            }
+
+        }
+
+        private fun analyze() {
+            frames = MethodTransformer.analyze(internalClassName, methodNode, Interpreter())
+            trackPops()
+            assignLocalVars()
+
+            refValues.removeAll { !it.canRewrite() }
+        }
+
+        private fun trackPops() {
+            for (i in insns.indices) {
+                val frame = frames[i] ?: continue
+                val insn = insns[i]
+
+                when (insn.opcode) {
+                    Opcodes.POP -> {
+                        frame.top()?.getCapturedVarOrNull()?.run { stackInsns.add(insn) }
+                    }
+                    Opcodes.POP2 -> {
+                        val top = frame.top()
+                        if (top?.size == 1) {
+                            top.getCapturedVarOrNull()?.hazard = true
+                            frame.peek(1)?.getCapturedVarOrNull()?.hazard = true
+                        }
+                    }
+                }
+            }
+        }
+
+        private fun BasicValue.getCapturedVarOrNull() =
+                safeAs<ProperTrackedReferenceValue>()?.descriptor?.safeAs<CapturedVarDescriptor>()
+
+        private fun assignLocalVars() {
+            for (localVar in methodNode.localVariables) {
+                val type = Type.getType(localVar.desc)
+                if (!AsmTypes.isSharedVarType(type)) continue
+
+                val startFrame = frames[localVar.start.getIndex()] ?: continue
+
+                val refValue = startFrame.getLocal(localVar.index) as? ProperTrackedReferenceValue ?: continue
+                val descriptor = refValue.descriptor as? CapturedVarDescriptor ?: continue
+
+                if (descriptor.hazard) continue
+
+                if (descriptor.localVar == null) {
+                    descriptor.localVar = localVar
+                }
+                else {
+                    descriptor.hazard = true
+                }
+            }
+
+            for (refValue in refValues) {
+                if (refValue.hazard) continue
+                val localVar = refValue.localVar ?: continue
+
+                if (refValue.valueType.size != 1) {
+                    refValue.localVarIndex = methodNode.maxLocals
+                    methodNode.maxLocals += 2
+                    localVar.index = refValue.localVarIndex
+                }
+                else {
+                    refValue.localVarIndex = localVar.index
+                }
+
+                val startIndex = localVar.start.getIndex()
+                val initFieldInsns = refValue.putFieldInsns.filter { it.getIndex() < startIndex }
+                if (initFieldInsns.size != 1) {
+                    refValue.hazard = true
+                    continue
+                }
+            }
+        }
+
+        private fun rewrite() {
+            for (refValue in refValues) {
+                if (!refValue.canRewrite()) continue
+
+                rewriteRefValue(refValue)
+            }
+
+            methodNode.removeEmptyCatchBlocks()
+            methodNode.removeUnusedLocalVariables()
+        }
+
+        private fun rewriteRefValue(capturedVar: CapturedVarDescriptor) {
+            methodNode.instructions.run {
+                capturedVar.localVar!!.let {
+                    it.signature = null
+                    it.desc = capturedVar.valueType.descriptor
+                }
+
+                remove(capturedVar.newInsn)
+                remove(capturedVar.initCallInsn!!)
+                capturedVar.stackInsns.forEach { remove(it) }
+                capturedVar.aloadInsns.forEach { remove(it) }
+                capturedVar.astoreInsns.forEach { remove(it) }
+
+                capturedVar.getFieldInsns.forEach {
+                    set(it, VarInsnNode(capturedVar.valueType.getOpcode(Opcodes.ILOAD), capturedVar.localVarIndex))
+                }
+
+                capturedVar.putFieldInsns.forEach {
+                    set(it, VarInsnNode(capturedVar.valueType.getOpcode(Opcodes.ISTORE), capturedVar.localVarIndex))
+                }
+            }
+        }
+    }
+}
+
+internal const val REF_ELEMENT_FIELD = "element"
+internal const val INIT_METHOD_NAME = "<init>"
+
+internal val REF_TYPE_TO_ELEMENT_TYPE = HashMap<String, Type>().apply {
+    put(AsmTypes.OBJECT_REF_TYPE.internalName, AsmTypes.OBJECT_TYPE)
+    PrimitiveType.values().forEach {
+        put(AsmTypes.sharedTypeForPrimitive(it).internalName, AsmTypes.valueTypeForPrimitive(it))
+    }
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/captured/ReferenceTrackingInterpreter.kt

@@ -0,0 +1,102 @@
+/*
+ * 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.codegen.optimization.captured
+
+import org.jetbrains.kotlin.codegen.optimization.common.OptimizationBasicInterpreter
+import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode
+import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue
+
+abstract class ReferenceTrackingInterpreter : OptimizationBasicInterpreter() {
+    override fun merge(v: BasicValue, w: BasicValue): BasicValue =
+            when {
+                v is ProperTrackedReferenceValue && w is ProperTrackedReferenceValue ->
+                    if (v.descriptor == w.descriptor)
+                        v
+                    else
+                        TaintedTrackedReferenceValue(
+                                getTaintedValueType(v.type, w.type),
+                                setOf(v.descriptor, w.descriptor)
+                        )
+
+                v is TrackedReferenceValue || w is TrackedReferenceValue ->
+                    TaintedTrackedReferenceValue(
+                            getTaintedValueType(v.type, w.type),
+                            v.referenceValueDescriptors + w.referenceValueDescriptors
+                    )
+
+                else ->
+                    super.merge(v, w)
+            }
+
+    private val BasicValue.referenceValueDescriptors: Set<ReferenceValueDescriptor>
+        get() = if (this is TrackedReferenceValue) this.descriptors else emptySet()
+
+    private fun getTaintedValueType(type1: Type?, type2: Type?): Type =
+            when {
+                type1 == null || type2 == null -> AsmTypes.OBJECT_TYPE
+                type1 == type2 -> type1
+                else -> AsmTypes.OBJECT_TYPE
+            }
+
+    override fun copyOperation(insn: AbstractInsnNode, value: BasicValue): BasicValue? =
+            if (value is TrackedReferenceValue) {
+                checkRefValuesUsages(insn, listOf(value))
+                value
+            }
+            else {
+                super.copyOperation(insn, value)
+            }
+
+    override fun unaryOperation(insn: AbstractInsnNode, value: BasicValue): BasicValue? {
+        checkRefValuesUsages(insn, listOf(value))
+        return super.unaryOperation(insn, value)
+    }
+
+    override fun binaryOperation(insn: AbstractInsnNode, value1: BasicValue, value2: BasicValue): BasicValue? {
+        checkRefValuesUsages(insn, listOf(value1, value2))
+        return super.binaryOperation(insn, value1, value2)
+    }
+
+    override fun ternaryOperation(insn: AbstractInsnNode, value1: BasicValue, value2: BasicValue, value3: BasicValue): BasicValue? {
+        checkRefValuesUsages(insn, listOf(value1, value2, value3))
+        return super.ternaryOperation(insn, value1, value2, value3)
+    }
+
+    override fun naryOperation(insn: AbstractInsnNode, values: List<BasicValue>): BasicValue? {
+        checkRefValuesUsages(insn, values)
+        return super.naryOperation(insn, values)
+    }
+
+    protected open fun checkRefValuesUsages(insn: AbstractInsnNode, values: List<BasicValue>) {
+        values.forEach { value ->
+            if (value is TaintedTrackedReferenceValue) {
+                value.descriptors.forEach { it.onUseAsTainted() }
+            }
+        }
+
+        values.forEachIndexed { pos, value ->
+            if (value is TrackedReferenceValue) {
+                processRefValueUsage(value, insn, pos)
+            }
+        }
+    }
+
+    protected abstract fun processRefValueUsage(value: TrackedReferenceValue, insn: AbstractInsnNode, position: Int)
+}
+

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/captured/TrackedReferenceValue.kt

@@ -0,0 +1,55 @@
+/*
+ * 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.codegen.optimization.captured
+
+import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue
+import org.jetbrains.org.objectweb.asm.Type
+
+interface ReferenceValueDescriptor {
+    fun onUseAsTainted()
+}
+
+abstract class TrackedReferenceValue(type: Type): StrictBasicValue(type) {
+    abstract val descriptors: Set<ReferenceValueDescriptor>
+}
+
+class ProperTrackedReferenceValue(type: Type, val descriptor: ReferenceValueDescriptor) : TrackedReferenceValue(type) {
+    override val descriptors: Set<ReferenceValueDescriptor>
+        get() = setOf(descriptor)
+
+    override fun equals(other: Any?): Boolean =
+            other === this ||
+            other is ProperTrackedReferenceValue && other.descriptor == this.descriptor
+
+    override fun hashCode(): Int =
+            descriptor.hashCode()
+
+    override fun toString(): String =
+            "[$descriptor]"
+}
+
+class TaintedTrackedReferenceValue(type: Type, override val descriptors: Set<ReferenceValueDescriptor>) : TrackedReferenceValue(type) {
+    override fun equals(other: Any?): Boolean =
+            other === this ||
+            other is TaintedTrackedReferenceValue && other.descriptors == this.descriptors
+
+    override fun hashCode(): Int =
+            descriptors.hashCode()
+
+    override fun toString(): String =
+            "!$descriptors"
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/OptimizationBasicInterpreter.java

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.codegen.optimization.common;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.codegen.AsmUtil;
+import org.jetbrains.kotlin.codegen.inline.InlineCodegenUtil;
 import org.jetbrains.org.objectweb.asm.Handle;
 import org.jetbrains.org.objectweb.asm.Opcodes;
 import org.jetbrains.org.objectweb.asm.Type;
@@ -136,7 +137,7 @@ public class OptimizationBasicInterpreter extends Interpreter<BasicValue> implem
             case NEW:
                 return newValue(Type.getObjectType(((TypeInsnNode) insn).desc));
             default:
-                throw new Error("Internal error.");
+                throw new IllegalArgumentException("Unexpected instruction: " + InlineCodegenUtil.getInsnOpcodeText(insn));
         }
     }
 
@@ -221,7 +222,7 @@ public class OptimizationBasicInterpreter extends Interpreter<BasicValue> implem
             case PUTFIELD:
                 return null;
             default:
-                throw new Error("Internal error.");
+                throw new IllegalArgumentException("Unexpected instruction: " + InlineCodegenUtil.getInsnOpcodeText(insn));
         }
     }
 
@@ -340,7 +341,7 @@ public class OptimizationBasicInterpreter extends Interpreter<BasicValue> implem
             case IFNONNULL:
                 return null;
             default:
-                throw new Error("Internal error.");
+                throw new IllegalArgumentException("Unexpected instruction: " + InlineCodegenUtil.getInsnOpcodeText(insn));
         }
     }
 

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/StrictBasicValue.kt

@@ -52,7 +52,7 @@ open class StrictBasicValue(type: Type?) : BasicValue(type) {
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other?.javaClass != javaClass) return false
+        if (other == null || other::class.java != this::class.java) return false
         if (!super.equals(other)) return false
 
         other as StrictBasicValue

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/common/Util.kt

@@ -17,8 +17,10 @@
 package org.jetbrains.kotlin.codegen.optimization.common
 
 import org.jetbrains.kotlin.codegen.inline.InlineCodegenUtil
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 import org.jetbrains.org.objectweb.asm.Opcodes
 import org.jetbrains.org.objectweb.asm.Opcodes.*
+import org.jetbrains.org.objectweb.asm.Type
 import org.jetbrains.org.objectweb.asm.tree.*
 
 val AbstractInsnNode.isMeaningful: Boolean get() =
@@ -50,9 +52,7 @@ fun MethodNode.prepareForEmitting() {
 
     // local variables with live ranges starting after last meaningful instruction lead to VerifyError
     localVariables = localVariables.filter { lv ->
-        InsnSequence(lv.start, lv.end).any { insn ->
-            insn.isMeaningful
-        }
+        InsnSequence(lv.start, lv.end).any(AbstractInsnNode::isMeaningful)
     }
 
     // We should remove linenumbers after last meaningful instruction
@@ -71,10 +71,64 @@ fun MethodNode.prepareForEmitting() {
 
 fun MethodNode.removeEmptyCatchBlocks() {
     tryCatchBlocks = tryCatchBlocks.filter { tcb ->
-        InsnSequence(tcb.start, tcb.end).any { insn ->
-            insn.isMeaningful
+        InsnSequence(tcb.start, tcb.end).any(AbstractInsnNode::isMeaningful)
+    }
+}
+
+fun MethodNode.removeUnusedLocalVariables() {
+    val used = BooleanArray(maxLocals) { false }
+    for (insn in instructions) {
+        when (insn) {
+            is VarInsnNode -> {
+                val varIndex = insn.`var`
+                used[varIndex] = true
+                if (insn.isSize2LoadStoreOperation()) {
+                    used[varIndex + 1] = true
+                }
+            }
+            is IincInsnNode ->
+                used[insn.`var`] = true
         }
     }
+    for (localVar in localVariables) {
+        val varIndex = localVar.index
+        used[varIndex] = true
+        val type = Type.getType(localVar.desc)
+        if (type.size == 2) {
+            used[varIndex + 1] = true
+        }
+    }
+
+    if (used.all { it }) return
+
+    val remapping = IntArray(maxLocals) { 0 }
+    var lastUnused = 0
+    for (i in remapping.indices) {
+        remapping[i] = lastUnused
+        if (used[i]) {
+            lastUnused++
+        }
+    }
+
+    remapLocalVariables(remapping)
+}
+
+private fun VarInsnNode.isSize2LoadStoreOperation() =
+        opcode == LLOAD || opcode == DLOAD || opcode == LSTORE || opcode == DSTORE
+
+fun MethodNode.remapLocalVariables(remapping: IntArray) {
+    for (insn in instructions.toArray()) {
+        when (insn) {
+            is VarInsnNode ->
+                insn.`var` = remapping[insn.`var`]
+            is IincInsnNode ->
+                insn.`var` = remapping[insn.`var`]
+        }
+    }
+
+    for (localVariableNode in localVariables) {
+        localVariableNode.index = remapping[localVariableNode.index]
+    }
 }
 
 inline fun AbstractInsnNode.findNextOrNull(predicate: (AbstractInsnNode) -> Boolean): AbstractInsnNode? {
@@ -119,9 +173,16 @@ val AbstractInsnNode.intConstant: Int? get() =
 
 fun insnListOf(vararg insns: AbstractInsnNode) = InsnList().apply { insns.forEach { add(it) } }
 
-fun AbstractInsnNode.isStoreOperation(): Boolean = getOpcode() in Opcodes.ISTORE..Opcodes.ASTORE
-fun AbstractInsnNode.isLoadOperation(): Boolean = getOpcode() in Opcodes.ILOAD..Opcodes.ALOAD
+fun AbstractInsnNode.isStoreOperation(): Boolean = opcode in Opcodes.ISTORE..Opcodes.ASTORE
+fun AbstractInsnNode.isLoadOperation(): Boolean = opcode in Opcodes.ILOAD..Opcodes.ALOAD
 
 val AbstractInsnNode?.insnText get() = InlineCodegenUtil.getInsnText(this)
 val AbstractInsnNode?.debugText get() =
-        if (this == null) "<null>" else "${this.javaClass.simpleName}: $insnText"
+        if (this == null) "<null>" else "${this::class.java.simpleName}: $insnText"
+
+internal inline fun <reified T : AbstractInsnNode> AbstractInsnNode.isInsn(opcode: Int, condition: T.() -> Boolean): Boolean =
+        takeInsnIf(opcode, condition) != null
+
+internal inline fun <reified T : AbstractInsnNode> AbstractInsnNode.takeInsnIf(opcode: Int, condition: T.() -> Boolean): T? =
+        takeIf { it.opcode == opcode }?.safeAs<T>()?.takeIf { it.condition() }
+

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/fixStack/FixStackAnalyzer.kt

@@ -58,16 +58,9 @@ internal class FixStackAnalyzer(
         for (marker in context.fakeAlwaysFalseIfeqMarkers) {
             val next = marker.next
             if (next is JumpInsnNode) {
-                val nop = InsnNode(Opcodes.NOP)
-                expectedStackNode[next.label] = nop
-                method.instructions.insert(next, nop)
-                method.instructions.remove(marker)
-                method.instructions.remove(next)
-                context.nodesToRemoveOnCleanup.add(nop)
+                expectedStackNode[next.label] = marker
             }
         }
-
-        context.fakeAlwaysFalseIfeqMarkers.clear()
     }
 
     private val analyzer = InternalAnalyzer(owner, method, context)

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/fixStack/FixStackContext.kt

@@ -39,8 +39,6 @@ internal class FixStackContext(val methodNode: MethodNode) {
     val openingInlineMethodMarker = hashMapOf<AbstractInsnNode, AbstractInsnNode>()
     var consistentInlineMarkers: Boolean = true; private set
 
-    val nodesToRemoveOnCleanup = arrayListOf<AbstractInsnNode>()
-
     init {
         saveStackMarkerForRestoreMarker = insertTryCatchBlocksMarkers(methodNode)
         isThereAnyTryCatch = saveStackMarkerForRestoreMarker.isNotEmpty()

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/fixStack/FixStackMethodTransformer.kt

@@ -39,31 +39,51 @@ class FixStackMethodTransformer : MethodTransformer() {
         }
 
         if (context.isAnalysisRequired()) {
-            val analyzer = FixStackAnalyzer(internalClassName, methodNode, context)
-            analyzer.analyze()
-
-            methodNode.maxStack = methodNode.maxStack + analyzer.maxExtraStackSize
-
-            val actions = arrayListOf<() -> Unit>()
-
-            transformBreakContinueGotos(methodNode, context, actions, analyzer)
-
-            transformSaveRestoreStackMarkers(methodNode, context, actions, analyzer)
-
-            actions.forEach { it() }
+            analyzeAndTransformBreakContinueGotos(context, internalClassName, methodNode)
+            removeAlwaysFalseIfeqMarkers(context, methodNode)
+            analyzeAndTransformSaveRestoreStack(context, internalClassName, methodNode)
         }
 
-        context.fakeAlwaysTrueIfeqMarkers.forEach { marker ->
-            replaceAlwaysTrueIfeqWithGoto(methodNode, marker)
-        }
+        removeAlwaysTrueIfeqMarkers(context, methodNode)
+        removeAlwaysFalseIfeqMarkers(context, methodNode)
+    }
 
+    private fun analyzeAndTransformBreakContinueGotos(context: FixStackContext, internalClassName: String, methodNode: MethodNode) {
+        val analyzer = FixStackAnalyzer(internalClassName, methodNode, context)
+        analyzer.analyze()
+
+        methodNode.maxStack = methodNode.maxStack + analyzer.maxExtraStackSize
+
+        val actions = arrayListOf<() -> Unit>()
+
+        transformBreakContinueGotos(methodNode, context, actions, analyzer)
+
+        actions.forEach { it() }
+    }
+
+    private fun analyzeAndTransformSaveRestoreStack(context: FixStackContext, internalClassName: String, methodNode: MethodNode) {
+        val analyzer = FixStackAnalyzer(internalClassName, methodNode, context)
+        analyzer.analyze()
+
+        val actions = arrayListOf<() -> Unit>()
+
+        transformSaveRestoreStackMarkers(methodNode, context, actions, analyzer)
+
+        actions.forEach { it() }
+    }
+
+    private fun removeAlwaysFalseIfeqMarkers(context: FixStackContext, methodNode: MethodNode) {
         context.fakeAlwaysFalseIfeqMarkers.forEach { marker ->
             removeAlwaysFalseIfeq(methodNode, marker)
         }
+        context.fakeAlwaysFalseIfeqMarkers.clear()
+    }
 
-        context.nodesToRemoveOnCleanup.forEach {
-            methodNode.instructions.remove(it)
+    private fun removeAlwaysTrueIfeqMarkers(context: FixStackContext, methodNode: MethodNode) {
+        context.fakeAlwaysTrueIfeqMarkers.forEach { marker ->
+            replaceAlwaysTrueIfeqWithGoto(methodNode, marker)
         }
+        context.fakeAlwaysTrueIfeqMarkers.clear()
     }
 
     private fun transformBreakContinueGotos(

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/fixStack/StackTransformationUtils.kt

@@ -26,7 +26,7 @@ fun <V : Value> Frame<V>.top(): V? =
         peek(0)
 
 fun <V : Value> Frame<V>.peek(offset: Int): V? =
-        if (stackSize >= offset) getStack(stackSize - offset - 1) else null
+        if (stackSize > offset) getStack(stackSize - offset - 1) else null
 
 class SavedStackDescriptor(
         val savedValues: List<BasicValue>,

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/nullCheck/NullabilityInterpreter.kt

@@ -0,0 +1,106 @@
+/*
+ * 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.codegen.optimization.nullCheck
+
+import org.jetbrains.kotlin.codegen.optimization.boxing.*
+import org.jetbrains.kotlin.codegen.optimization.common.OptimizationBasicInterpreter
+import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue
+import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode
+import org.jetbrains.org.objectweb.asm.tree.TypeInsnNode
+import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue
+
+class NullabilityInterpreter : OptimizationBasicInterpreter() {
+    override fun newOperation(insn: AbstractInsnNode): BasicValue? {
+        val defaultResult = super.newOperation(insn)
+        val resultType = defaultResult?.type
+
+        return when {
+            insn.opcode == Opcodes.ACONST_NULL ->
+                NullBasicValue
+            insn.opcode == Opcodes.NEW ->
+                NotNullBasicValue(resultType)
+            insn.opcode == Opcodes.LDC && resultType.isReferenceType() ->
+                NotNullBasicValue(resultType)
+            insn.isUnitInstance() ->
+                NotNullBasicValue(resultType)
+            else ->
+                defaultResult
+        }
+    }
+
+    private fun Type?.isReferenceType() =
+            this?.sort.let { it == Type.OBJECT || it == Type.ARRAY }
+
+    override fun unaryOperation(insn: AbstractInsnNode, value: BasicValue?): BasicValue? {
+        val defaultResult = super.unaryOperation(insn, value)
+        val resultType = defaultResult?.type
+
+        return when {
+            insn.opcode == Opcodes.CHECKCAST ->
+                value
+            insn.opcode == Opcodes.NEWARRAY || insn.opcode == Opcodes.ANEWARRAY ->
+                NotNullBasicValue(resultType)
+            else ->
+                defaultResult
+        }
+    }
+
+    override fun naryOperation(insn: AbstractInsnNode, values: List<BasicValue>): BasicValue? {
+        val defaultResult = super.naryOperation(insn, values)
+        val resultType = defaultResult?.type
+
+        return when {
+            insn.isBoxing() ->
+                NotNullBasicValue(resultType)
+            insn.isIteratorMethodCallOfProgression(values) ->
+                ProgressionIteratorBasicValue.byProgressionClassType(values[0].type)
+            insn.isNextMethodCallOfProgressionIterator(values) ->
+                NotNullBasicValue(resultType)
+            else ->
+                defaultResult
+        }
+    }
+
+    override fun merge(v: BasicValue, w: BasicValue): BasicValue =
+            when {
+                v is NullBasicValue && w is NullBasicValue ->
+                    NullBasicValue
+                v is NullBasicValue || w is NullBasicValue ->
+                    StrictBasicValue.REFERENCE_VALUE
+                v is ProgressionIteratorBasicValue && w is ProgressionIteratorBasicValue ->
+                    mergeNotNullValuesOfSameKind(v, w)
+                v is ProgressionIteratorBasicValue && w is NotNullBasicValue ->
+                    NotNullBasicValue.NOT_NULL_REFERENCE_VALUE
+                w is ProgressionIteratorBasicValue && v is NotNullBasicValue ->
+                    NotNullBasicValue.NOT_NULL_REFERENCE_VALUE
+                v is NotNullBasicValue && w is NotNullBasicValue ->
+                    mergeNotNullValuesOfSameKind(v, w)
+                else ->
+                    super.merge(v, w)
+            }
+
+    private fun mergeNotNullValuesOfSameKind(v: StrictBasicValue, w: StrictBasicValue) =
+            if (v.type == w.type) v else NotNullBasicValue.NOT_NULL_REFERENCE_VALUE
+
+}
+
+
+fun TypeInsnNode.getObjectType(): Type =
+        Type.getObjectType(desc)
+

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/nullCheck/RedundantNullCheckMethodTransformer.kt

@@ -0,0 +1,97 @@
+/*
+ * 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.codegen.optimization.nullCheck
+
+import org.jetbrains.kotlin.codegen.optimization.DeadCodeEliminationMethodTransformer
+import org.jetbrains.kotlin.codegen.optimization.boxing.ProgressionIteratorBasicValue
+import org.jetbrains.kotlin.codegen.optimization.fixStack.top
+import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer
+import org.jetbrains.kotlin.utils.SmartList
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs
+import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.tree.InsnNode
+import org.jetbrains.org.objectweb.asm.tree.JumpInsnNode
+import org.jetbrains.org.objectweb.asm.tree.MethodNode
+import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue
+
+class RedundantNullCheckMethodTransformer : MethodTransformer() {
+    private val deadCodeElimination = DeadCodeEliminationMethodTransformer()
+
+    override fun transform(internalClassName: String, methodNode: MethodNode) {
+        while (runSingleNullCheckEliminationPass(internalClassName, methodNode)) {
+            deadCodeElimination.transform(internalClassName, methodNode)
+        }
+    }
+
+    private fun isAlwaysFalse(opcode: Int, nullability: Nullability) =
+            (opcode == Opcodes.IFNULL && nullability == Nullability.NOT_NULL) ||
+            (opcode == Opcodes.IFNONNULL && nullability == Nullability.NULL)
+
+    private fun isAlwaysTrue(opcode: Int, nullability: Nullability) =
+            (opcode == Opcodes.IFNULL && nullability == Nullability.NULL) ||
+            (opcode == Opcodes.IFNONNULL && nullability == Nullability.NOT_NULL)
+
+
+    private fun runSingleNullCheckEliminationPass(internalClassName: String, methodNode: MethodNode): Boolean {
+        val insnList = methodNode.instructions
+        val instructions = insnList.toArray()
+
+        val nullCheckIfs = instructions.mapNotNullTo(SmartList<JumpInsnNode>()) {
+            it.safeAs<JumpInsnNode>()?.takeIf {
+                it.opcode == Opcodes.IFNULL ||
+                it.opcode == Opcodes.IFNONNULL
+            }
+        }
+        if (nullCheckIfs.isEmpty()) return false
+
+        val frames = analyze(internalClassName, methodNode, NullabilityInterpreter())
+
+        val redundantNullCheckIfs = nullCheckIfs.mapNotNull { insn ->
+            frames[instructions.indexOf(insn)]?.top()?.let { top ->
+                val nullability = top.getNullability()
+                if (nullability == Nullability.NULLABLE)
+                    null
+                else
+                    Pair(insn, nullability)
+            }
+        }
+        if (redundantNullCheckIfs.isEmpty()) return false
+
+        for ((insn, nullability) in redundantNullCheckIfs) {
+            val previous = insn.previous
+            when (previous?.opcode) {
+                Opcodes.ALOAD, Opcodes.DUP ->
+                    insnList.remove(previous)
+                else ->
+                    insnList.insert(previous, InsnNode(Opcodes.POP))
+            }
+
+            when {
+                isAlwaysTrue(insn.opcode, nullability) ->
+                    insnList.set(insn, JumpInsnNode(Opcodes.GOTO, insn.label))
+                isAlwaysFalse(insn.opcode, nullability) ->
+                    insnList.remove(insn)
+            }
+        }
+
+        return true
+    }
+}
+
+
+
+

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/nullCheck/RedundantNullCheckV2MethodTransformer.kt

@@ -0,0 +1,367 @@
+/*
+ * 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.codegen.optimization.nullCheck
+
+import org.jetbrains.kotlin.codegen.coroutines.withInstructionAdapter
+import org.jetbrains.kotlin.codegen.inline.ReifiedTypeInliner
+import org.jetbrains.kotlin.codegen.optimization.DeadCodeEliminationMethodTransformer
+import org.jetbrains.kotlin.codegen.optimization.common.OptimizationBasicInterpreter
+import org.jetbrains.kotlin.codegen.optimization.common.isInsn
+import org.jetbrains.kotlin.codegen.optimization.fixStack.peek
+import org.jetbrains.kotlin.codegen.optimization.fixStack.top
+import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer
+import org.jetbrains.kotlin.utils.SmartList
+import org.jetbrains.kotlin.utils.addToStdlib.assertedCast
+import org.jetbrains.org.objectweb.asm.Label
+import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
+import org.jetbrains.org.objectweb.asm.tree.*
+
+class RedundantNullCheckV2MethodTransformer : MethodTransformer() {
+    override fun transform(internalClassName: String, methodNode: MethodNode) {
+        while (TransformerPass(internalClassName, methodNode).run()) {}
+    }
+
+    private class TransformerPass(val internalClassName: String, val methodNode: MethodNode) {
+        private var changes = false
+
+        private fun AbstractInsnNode.getIndex() =
+                methodNode.instructions.indexOf(this)
+
+        fun run(): Boolean {
+            val checkedReferenceTypes = analyzeTypesAndRemoveDeadCode()
+            eliminateRedundantChecks(checkedReferenceTypes)
+
+            return changes
+        }
+
+        private fun analyzeTypesAndRemoveDeadCode(): Map<AbstractInsnNode, Type> {
+            val insns = methodNode.instructions.toArray()
+            val frames = analyze(internalClassName, methodNode, OptimizationBasicInterpreter())
+
+            val checkedReferenceTypes = HashMap<AbstractInsnNode, Type>()
+            for (i in insns.indices) {
+                val insn = insns[i]
+                val frame = frames[i]
+                if (insn.isInstanceOfOrNullCheck()) {
+                    checkedReferenceTypes[insn] = frame?.top()?.type ?: continue
+                }
+                else if (insn.isCheckParameterNotNull()) {
+                    checkedReferenceTypes[insn] = frame?.peek(1)?.type ?: continue
+                }
+            }
+
+            val dceResult = DeadCodeEliminationMethodTransformer().removeDeadCodeByFrames(methodNode, frames)
+            if (dceResult.hasRemovedAnything()) {
+                changes = true
+            }
+
+            return checkedReferenceTypes
+        }
+
+        private fun eliminateRedundantChecks(checkedReferenceTypes: Map<AbstractInsnNode, Type>) {
+            val nullabilityAssumptions = injectNullabilityAssumptions(checkedReferenceTypes)
+
+            val nullabilityMap = analyzeNullabilities()
+
+            nullabilityAssumptions.revert()
+
+            transformTrivialChecks(nullabilityMap)
+        }
+
+        private fun injectNullabilityAssumptions(checkedReferenceTypes: Map<AbstractInsnNode, Type>) =
+                NullabilityAssumptionsBuilder(checkedReferenceTypes).injectNullabilityAssumptions()
+
+        private fun analyzeNullabilities(): Map<AbstractInsnNode, Nullability> {
+            val frames = analyze(internalClassName, methodNode, NullabilityInterpreter())
+            val insns = methodNode.instructions.toArray()
+            val nullabilityMap = HashMap<AbstractInsnNode, Nullability>()
+            for (i in insns.indices) {
+                val nullability = frames[i]?.top()?.getNullability() ?: continue
+                if (nullability == Nullability.NULLABLE) continue
+
+                val insn = insns[i]
+                if (insn.isInstanceOfOrNullCheck()) {
+                    nullabilityMap[insn] = nullability
+                }
+            }
+            return nullabilityMap
+        }
+
+        private fun transformTrivialChecks(nullabilityMap: Map<AbstractInsnNode, Nullability>) {
+            for ((insn, nullability) in nullabilityMap) {
+                when (insn.opcode) {
+                    Opcodes.IFNULL -> transformTrivialNullJump(insn as JumpInsnNode, nullability == Nullability.NULL)
+                    Opcodes.IFNONNULL -> transformTrivialNullJump(insn as JumpInsnNode, nullability == Nullability.NOT_NULL)
+                    Opcodes.INSTANCEOF -> transformInstanceOf(insn, nullability)
+                }
+            }
+        }
+
+        private fun transformTrivialNullJump(insn: JumpInsnNode, alwaysTrue: Boolean) {
+            changes = true
+
+            methodNode.instructions.run {
+                popReferenceValueBefore(insn)
+                if (alwaysTrue) {
+                    set(insn, JumpInsnNode(Opcodes.GOTO, insn.label))
+                }
+                else {
+                    remove(insn)
+                }
+            }
+        }
+
+        private fun transformInstanceOf(insn: AbstractInsnNode, nullability: Nullability) {
+            if (nullability != Nullability.NULL) return
+            if (ReifiedTypeInliner.isOperationReifiedMarker(insn.previous)) return
+
+            changes = true
+
+            val nextOpcode = insn.next?.opcode
+            if (nextOpcode == Opcodes.IFEQ || nextOpcode == Opcodes.IFNE)
+                transformNullInstanceOfWithJump(insn)
+            else
+                transformNullInstanceOf(insn)
+        }
+
+        private fun transformNullInstanceOf(insn: AbstractInsnNode) {
+            methodNode.instructions.run {
+                popReferenceValueBefore(insn)
+                set(insn, InsnNode(Opcodes.ICONST_0))
+            }
+        }
+
+        private fun transformNullInstanceOfWithJump(insn: AbstractInsnNode) {
+            methodNode.instructions.run {
+                popReferenceValueBefore(insn)
+                val jump = insn.next.assertedCast<JumpInsnNode> { "JumpInsnNode expected" }
+                remove(insn)
+                if (jump.opcode == Opcodes.IFEQ) {
+                    set(jump, JumpInsnNode(Opcodes.GOTO, jump.label))
+                }
+                else {
+                    remove(jump)
+                }
+            }
+        }
+
+        private inner class NullabilityAssumptionsBuilder(val checkedReferenceTypes: Map<AbstractInsnNode, Type>) {
+
+            private val checksDependingOnVariable = HashMap<Int, MutableList<AbstractInsnNode>>()
+
+            fun injectNullabilityAssumptions(): NullabilityAssumptions {
+                collectVariableDependentChecks()
+                return injectAssumptions()
+            }
+
+            private fun collectVariableDependentChecks() {
+                for (insn in methodNode.instructions) {
+                    if (insn.isInstanceOfOrNullCheck()) {
+                        val previous = insn.previous ?: continue
+                        if (previous.opcode == Opcodes.ALOAD) {
+                            addDependentCheck(insn, previous as VarInsnNode)
+                        }
+                        else if (previous.opcode == Opcodes.DUP) {
+                            val previous2 = previous.previous ?: continue
+                            if (previous2.opcode == Opcodes.ALOAD) {
+                                addDependentCheck(insn, previous2 as VarInsnNode)
+                            }
+                        }
+                    }
+                    else if (insn.isCheckParameterNotNull()) {
+                        val ldcInsn = insn.previous ?: continue
+                        if (ldcInsn.opcode != Opcodes.LDC) continue
+                        val aLoadInsn = ldcInsn.previous ?: continue
+                        if (aLoadInsn.opcode != Opcodes.ALOAD) continue
+                        addDependentCheck(insn, aLoadInsn as VarInsnNode)
+                    }
+                }
+            }
+
+            private fun addDependentCheck(insn: AbstractInsnNode, aLoadInsn: VarInsnNode) {
+                checksDependingOnVariable.getOrPut(aLoadInsn.`var`) {
+                    SmartList<AbstractInsnNode>()
+                }.add(insn)
+            }
+
+            private fun injectAssumptions(): NullabilityAssumptions {
+                val nullabilityAssumptions = NullabilityAssumptions()
+                for ((varIndex, dependentChecks) in checksDependingOnVariable) {
+                    for (checkInsn in dependentChecks) {
+                        val varType = checkedReferenceTypes[checkInsn]
+                                      ?: throw AssertionError("No var type @${checkInsn.getIndex()}")
+                        nullabilityAssumptions.injectAssumptionsForCheck(varIndex, checkInsn, varType)
+                    }
+                }
+                return nullabilityAssumptions
+            }
+
+            private fun NullabilityAssumptions.injectAssumptionsForCheck(varIndex: Int, insn: AbstractInsnNode, varType: Type) {
+                when (insn.opcode) {
+                    Opcodes.IFNULL,
+                    Opcodes.IFNONNULL ->
+                        injectAssumptionsForNullCheck(varIndex, insn as JumpInsnNode, varType)
+                    Opcodes.INVOKESTATIC -> {
+                        assert(insn.isCheckParameterNotNull()) { "Expected non-null parameter check @${insn.getIndex()}"}
+                        injectAssumptionsForParameterNotNullCheck(varIndex, insn, varType)
+                    }
+                    Opcodes.INSTANCEOF ->
+                        injectAssumptionsForInstanceOfCheck(varIndex, insn, varType)
+                }
+            }
+
+            private fun NullabilityAssumptions.injectAssumptionsForNullCheck(varIndex: Int, insn: JumpInsnNode, varType: Type) {
+                //  ALOAD v
+                //  IFNULL L
+                //  <...>   -- v is not null here
+                // L:
+                //  <...>   -- v is null here
+
+                val jumpsIfNull = insn.opcode == Opcodes.IFNULL
+                val originalLabel = insn.label
+                originalLabels[insn] = originalLabel
+                insn.label = synthetic(LabelNode(Label()))
+
+                val insertAfterNull = if (jumpsIfNull) insn.label else insn
+                val insertAfterNonNull = if (jumpsIfNull) insn else insn.label
+
+                methodNode.instructions.run {
+                    add(insn.label)
+
+                    insert(insertAfterNull, listOfSynthetics {
+                        aconst(null)
+                        store(varIndex, varType)
+                        if (jumpsIfNull) {
+                            goTo(originalLabel.label)
+                        }
+                    })
+
+                    insert(insertAfterNonNull, listOfSynthetics {
+                        anew(varType)
+                        store(varIndex, varType)
+                        if (!jumpsIfNull) {
+                            goTo(originalLabel.label)
+                        }
+                    })
+                }
+            }
+
+            private fun NullabilityAssumptions.injectAssumptionsForParameterNotNullCheck(varIndex: Int, insn: AbstractInsnNode, varType: Type) {
+                //  ALOAD v
+                //  LDC param_name
+                //  INVOKESTATIC checkParameterIsNotNull
+                //  <...>   -- v is not null here (otherwise an exception was thrown)
+
+                methodNode.instructions.insert(insn, listOfSynthetics {
+                    anew(varType)
+                    store(varIndex, varType)
+                })
+            }
+
+            private fun NullabilityAssumptions.injectAssumptionsForInstanceOfCheck(varIndex: Int, insn: AbstractInsnNode, varType: Type) {
+                //  ALOAD v
+                //  INSTANCEOF T
+                //  IFEQ L
+                //  <...>  -- v is not null here (because it is an instance of T)
+                // L:
+                //  <...>  -- v is something else here (maybe null)
+
+                val next = insn.next ?: return
+                if (next.opcode != Opcodes.IFEQ && next.opcode != Opcodes.IFNE) return
+                if (next !is JumpInsnNode) return
+                val jumpsIfInstance = next.opcode == Opcodes.IFNE
+
+                val originalLabel: LabelNode?
+                val insertAfterNotNull: AbstractInsnNode
+                if (jumpsIfInstance) {
+                    originalLabel = next.label
+                    originalLabels[next] = next.label
+                    val newLabel = synthetic(LabelNode(Label()))
+                    methodNode.instructions.add(newLabel)
+                    next.label = newLabel
+                    insertAfterNotNull = newLabel
+                }
+                else {
+                    originalLabel = null
+                    insertAfterNotNull = next
+                }
+
+                methodNode.instructions.run {
+                    insert(insertAfterNotNull, listOfSynthetics {
+                        anew(varType)
+                        store(varIndex, varType)
+                        if (originalLabel != null) {
+                            goTo(originalLabel.label)
+                        }
+                    })
+                }
+            }
+
+        }
+
+        inner class NullabilityAssumptions {
+            val originalLabels = HashMap<JumpInsnNode, LabelNode>()
+            val syntheticInstructions = ArrayList<AbstractInsnNode>()
+
+            fun <T : AbstractInsnNode> synthetic(insn: T): T {
+                syntheticInstructions.add(insn)
+                return insn
+            }
+
+            inline fun listOfSynthetics(block: InstructionAdapter.() -> Unit): InsnList {
+                val insnList = withInstructionAdapter(block)
+                for (insn in insnList) {
+                    synthetic(insn)
+                }
+                return insnList
+            }
+
+            fun revert() {
+                methodNode.instructions.run {
+                    syntheticInstructions.forEach { remove(it) }
+                }
+                for ((jumpInsn, originalLabel) in originalLabels) {
+                    jumpInsn.label = originalLabel
+                }
+            }
+        }
+    }
+}
+
+internal fun AbstractInsnNode.isInstanceOfOrNullCheck() =
+        opcode == Opcodes.INSTANCEOF || opcode == Opcodes.IFNULL || opcode == Opcodes.IFNONNULL
+
+internal fun AbstractInsnNode.isCheckParameterNotNull() =
+        isInsn<MethodInsnNode>(Opcodes.INVOKESTATIC) {
+            owner == "kotlin/jvm/internal/Intrinsics" &&
+            name == "checkParameterIsNotNull" &&
+            desc == "(Ljava/lang/Object;Ljava/lang/String;)V"
+        }
+
+internal fun InsnList.popReferenceValueBefore(insn: AbstractInsnNode) {
+    val prev = insn.previous
+    when (prev?.opcode) {
+        Opcodes.ACONST_NULL,
+        Opcodes.DUP,
+        Opcodes.ALOAD ->
+            remove(prev)
+        else ->
+            insertBefore(insn, InsnNode(Opcodes.POP))
+    }
+}

compiler/backend/src/org/jetbrains/kotlin/codegen/optimization/nullCheck/nullabilityValues.kt

@@ -0,0 +1,50 @@
+/*
+ * 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.codegen.optimization.nullCheck
+
+import org.jetbrains.kotlin.codegen.optimization.boxing.ProgressionIteratorBasicValue
+import org.jetbrains.kotlin.codegen.optimization.common.StrictBasicValue
+import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.tree.analysis.BasicValue
+
+class NotNullBasicValue(type: Type?) : StrictBasicValue(type) {
+    override fun equals(other: Any?): Boolean = other is NotNullBasicValue
+    // We do not differ not-nullable values, so we should always return the same hashCode
+    // Actually it doesn't really matter because analyzer is not supposed to store values in hashtables
+    override fun hashCode() = 0
+
+    companion object {
+        val NOT_NULL_REFERENCE_VALUE = NotNullBasicValue(StrictBasicValue.REFERENCE_VALUE.type)
+    }
+}
+
+object NullBasicValue : StrictBasicValue(AsmTypes.OBJECT_TYPE)
+
+enum class Nullability {
+    NULL, NOT_NULL, NULLABLE;
+    fun isNull() = this == NULL
+    fun isNotNull() = this == NOT_NULL
+}
+
+fun BasicValue.getNullability(): Nullability =
+        when (this) {
+            is NullBasicValue -> Nullability.NULL
+            is NotNullBasicValue -> Nullability.NOT_NULL
+            is ProgressionIteratorBasicValue -> Nullability.NOT_NULL
+            else -> Nullability.NULLABLE
+        }

compiler/backend/src/org/jetbrains/kotlin/codegen/serialization/JvmSerializerExtension.java

@@ -28,6 +28,7 @@ import org.jetbrains.kotlin.load.java.lazy.types.RawTypeImpl;
 import org.jetbrains.kotlin.load.kotlin.JavaFlexibleTypeDeserializer;
 import org.jetbrains.kotlin.load.kotlin.TypeSignatureMappingKt;
 import org.jetbrains.kotlin.name.ClassId;
+import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.serialization.AnnotationSerializer;
 import org.jetbrains.kotlin.serialization.ProtoBuf;
 import org.jetbrains.kotlin.serialization.SerializerExtension;
@@ -77,7 +78,7 @@ public class JvmSerializerExtension extends SerializerExtension {
     }
 
     @Override
-    public void serializePackage(@NotNull ProtoBuf.Package.Builder proto) {
+    public void serializePackage(@NotNull FqName packageFqName, @NotNull ProtoBuf.Package.Builder proto) {
         if (!moduleName.equals(JvmAbi.DEFAULT_MODULE_NAME)) {
             proto.setExtension(JvmProtoBuf.packageModuleName, stringTable.getStringIndex(moduleName));
         }

compiler/backend/src/org/jetbrains/kotlin/codegen/serialization/JvmStringTable.kt

@@ -44,7 +44,7 @@ class JvmStringTable(private val typeMapper: KotlinTypeMapper) : StringTable {
 
                     val lastRecord = records.lastOrNull()
                     if (lastRecord != null && lastRecord.isTrivial()) {
-                        lastRecord.setRange(lastRecord.range + 1)
+                        lastRecord.range = lastRecord.range + 1
                     }
                     else records.add(Record.newBuilder())
                 }
@@ -93,12 +93,12 @@ class JvmStringTable(private val typeMapper: KotlinTypeMapper) : StringTable {
         else {
             val predefinedIndex = JvmNameResolver.getPredefinedStringIndex(string)
             if (predefinedIndex != null) {
-                record.setPredefinedIndex(predefinedIndex)
+                record.predefinedIndex = predefinedIndex
                 // TODO: move all records with predefined names to the end and do not write associated strings for them (since they are ignored)
                 strings.add("")
             }
             else {
-                record.setOperation(Record.Operation.DESC_TO_CLASS_ID)
+                record.operation = Record.Operation.DESC_TO_CLASS_ID
                 strings.add("L${string.replace('.', '$')};")
             }
         }

compiler/backend/src/org/jetbrains/kotlin/codegen/state/GenerationState.kt

@@ -45,7 +45,6 @@ import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.diagnostics.Diagnostics
 import org.jetbrains.kotlin.resolve.jvm.JvmClassName
 import org.jetbrains.kotlin.serialization.deserialization.DeserializationConfiguration
-import org.jetbrains.org.objectweb.asm.Opcodes
 import java.io.File
 
 class GenerationState @JvmOverloads constructor(
@@ -70,8 +69,9 @@ class GenerationState @JvmOverloads constructor(
     abstract class GenerateClassFilter {
         abstract fun shouldAnnotateClass(processingClassOrObject: KtClassOrObject): Boolean
         abstract fun shouldGenerateClass(processingClassOrObject: KtClassOrObject): Boolean
-        abstract fun shouldGeneratePackagePart(jetFile: KtFile): Boolean
+        abstract fun shouldGeneratePackagePart(ktFile: KtFile): Boolean
         abstract fun shouldGenerateScript(script: KtScript): Boolean
+        open fun shouldGenerateClassMembers(processingClassOrObject: KtClassOrObject) = shouldGenerateClass(processingClassOrObject)
 
         companion object {
             @JvmField val GENERATE_ALL: GenerateClassFilter = object : GenerateClassFilter() {
@@ -81,7 +81,7 @@ class GenerationState @JvmOverloads constructor(
 
                 override fun shouldGenerateScript(script: KtScript): Boolean = true
 
-                override fun shouldGeneratePackagePart(jetFile: KtFile): Boolean = true
+                override fun shouldGeneratePackagePart(ktFile: KtFile): Boolean = true
             }
         }
     }
@@ -92,7 +92,8 @@ class GenerationState @JvmOverloads constructor(
     val incrementalCacheForThisTarget: IncrementalCache?
     val packagesWithObsoleteParts: Set<FqName>
     val obsoleteMultifileClasses: List<FqName>
-    val deserializationConfiguration: DeserializationConfiguration = CompilerDeserializationConfiguration(configuration)
+    val deserializationConfiguration: DeserializationConfiguration =
+            CompilerDeserializationConfiguration(configuration.languageVersionSettings)
 
     init {
         val icComponents = configuration.get(JVMConfigurationKeys.INCREMENTAL_COMPILATION_COMPONENTS)
@@ -113,7 +114,7 @@ class GenerationState @JvmOverloads constructor(
         }
     }
 
-    val extraJvmDiagnosticsTrace: BindingTrace = DelegatingBindingTrace(bindingContext, "For extra diagnostics in ${this.javaClass}", false)
+    val extraJvmDiagnosticsTrace: BindingTrace = DelegatingBindingTrace(bindingContext, "For extra diagnostics in ${this::class.java}", false)
     private val interceptedBuilderFactory: ClassBuilderFactory
     private var used = false
 
@@ -123,7 +124,8 @@ class GenerationState @JvmOverloads constructor(
         extraJvmDiagnosticsTrace.bindingContext.diagnostics
     }
 
-    val isJvm8Target: Boolean = configuration.get(JVMConfigurationKeys.JVM_TARGET) == JvmTarget.JVM_1_8
+    val target = configuration.get(JVMConfigurationKeys.JVM_TARGET) ?: JvmTarget.DEFAULT
+    val isJvm8Target: Boolean = target == JvmTarget.JVM_1_8
     val isJvm8TargetWithDefaults: Boolean =  isJvm8Target && configuration.getBoolean(JVMConfigurationKeys.JVM8_TARGET_WITH_DEFAULTS)
     val generateDefaultImplsForJvm8: Boolean = configuration.getBoolean(JVMConfigurationKeys.INTERFACE_COMPATIBILITY)
 
@@ -162,7 +164,7 @@ class GenerationState @JvmOverloads constructor(
 
     val rootContext: CodegenContext<*> = RootContext(this)
 
-    val classFileVersion: Int = if (isJvm8Target) Opcodes.V1_8 else Opcodes.V1_6
+    val classFileVersion: Int = target.bytecodeVersion
 
     val generateParametersMetadata: Boolean = configuration.getBoolean(JVMConfigurationKeys.PARAMETERS_METADATA)
 

compiler/backend/src/org/jetbrains/kotlin/codegen/state/KotlinTypeMapper.java

@@ -192,6 +192,10 @@ public class KotlinTypeMapper {
             return asmTypeForAnonymousClass(bindingContext, (FunctionDescriptor) descriptor);
         }
 
+        if (descriptor instanceof ConstructorDescriptor) {
+            return mapClass(((ConstructorDescriptor) descriptor).getConstructedClass());
+        }
+
         DeclarationDescriptor container = descriptor.getContainingDeclaration();
         if (container instanceof PackageFragmentDescriptor) {
             String packageMemberOwner = internalNameForPackageMemberOwner((CallableMemberDescriptor) descriptor, publicFacade);
@@ -702,15 +706,14 @@ public class KotlinTypeMapper {
 
     @NotNull
     public CallableMethod mapToCallableMethod(@NotNull FunctionDescriptor descriptor, boolean superCall) {
-        if (descriptor instanceof TypeAliasConstructorDescriptor) {
-            return mapToCallableMethod(((TypeAliasConstructorDescriptor) descriptor).getUnderlyingConstructorDescriptor(), superCall);
-        }
-
-        if (descriptor instanceof ClassConstructorDescriptor) {
-            JvmMethodSignature method = mapSignatureSkipGeneric(descriptor);
-            Type owner = mapClass(((ClassConstructorDescriptor) descriptor).getContainingDeclaration());
-            String defaultImplDesc = mapDefaultMethod(descriptor, OwnerKind.IMPLEMENTATION).getDescriptor();
-            return new CallableMethod(owner, owner, defaultImplDesc, method, INVOKESPECIAL, null, null, null, false);
+        if (descriptor instanceof ConstructorDescriptor) {
+            JvmMethodSignature method = mapSignatureSkipGeneric(descriptor.getOriginal());
+            Type owner = mapOwner(descriptor);
+            String defaultImplDesc = mapDefaultMethod(descriptor.getOriginal(), OwnerKind.IMPLEMENTATION).getDescriptor();
+            return new CallableMethod(
+                    owner, owner, defaultImplDesc, method, INVOKESPECIAL,
+                    null, null, null, false
+            );
         }
 
         if (descriptor instanceof LocalVariableAccessorDescriptor) {
@@ -958,7 +961,7 @@ public class KotlinTypeMapper {
 
         if (!(descriptor instanceof ConstructorDescriptor) &&
             descriptor.getVisibility() == Visibilities.INTERNAL &&
-            !descriptor.getAnnotations().hasAnnotation(KotlinBuiltIns.FQ_NAMES.publishedApi)) {
+            !DescriptorUtilsKt.isPublishedApi(descriptor)) {
             return name + "$" + NameUtils.sanitizeAsJavaIdentifier(moduleName);
         }
 
@@ -1027,31 +1030,28 @@ public class KotlinTypeMapper {
             }
         }
 
+        if (f instanceof TypeAliasConstructorDescriptor) {
+            return mapSignature(((TypeAliasConstructorDescriptor) f).getUnderlyingConstructorDescriptor(), kind, skipGenericSignature);
+        }
+
+        if (f instanceof FunctionImportedFromObject) {
+            return mapSignature(((FunctionImportedFromObject) f).getCallableFromObject(), kind, skipGenericSignature);
+        }
+
         if (CoroutineCodegenUtilKt.isSuspendFunctionNotSuspensionView(f)) {
             return mapSignature(CoroutineCodegenUtilKt.getOrCreateJvmSuspendFunctionView(f), kind, skipGenericSignature);
         }
 
-        if (f instanceof ConstructorDescriptor) {
-            return mapSignature(f, kind, f.getOriginal().getValueParameters(), skipGenericSignature);
-        }
-
-        return mapSignature(f, kind, f.getValueParameters(), skipGenericSignature);
+        return mapSignatureWithCustomParameters(f, kind, f.getValueParameters(), skipGenericSignature);
     }
 
     @NotNull
-    public JvmMethodGenericSignature mapSignature(
+    public JvmMethodGenericSignature mapSignatureWithCustomParameters(
             @NotNull FunctionDescriptor f,
             @NotNull OwnerKind kind,
             @NotNull List<ValueParameterDescriptor> valueParameters,
             boolean skipGenericSignature
     ) {
-        if (f instanceof FunctionImportedFromObject) {
-            return mapSignature(((FunctionImportedFromObject) f).getCallableFromObject(), kind, skipGenericSignature);
-        }
-        else if (f instanceof TypeAliasConstructorDescriptor) {
-            return mapSignature(((TypeAliasConstructorDescriptor) f).getUnderlyingConstructorDescriptor(), kind, valueParameters, skipGenericSignature);
-        }
-
         checkOwnerCompatibility(f);
 
         JvmSignatureWriter sw = skipGenericSignature || f instanceof AccessorForCallableDescriptor
@@ -1422,7 +1422,7 @@ public class KotlinTypeMapper {
         List<ResolvedValueArgument> valueArguments = superCall.getValueArgumentsByIndex();
         assert valueArguments != null : "Failed to arrange value arguments by index: " + superDescriptor;
 
-        List<JvmMethodParameterSignature> parameters = mapSignatureSkipGeneric(superDescriptor).getValueParameters();
+        List<JvmMethodParameterSignature> parameters = mapSignatureSkipGeneric(superDescriptor.getOriginal()).getValueParameters();
 
         int params = parameters.size();
         int args = valueArguments.size();
@@ -1504,4 +1504,13 @@ public class KotlinTypeMapper {
 
         return null;
     }
+
+    @NotNull
+    public String classInternalName(@NotNull ClassDescriptor classDescriptor) {
+        Type recordedType = typeMappingConfiguration.getPredefinedTypeForClass(classDescriptor);
+        if (recordedType != null) {
+            return recordedType.getInternalName();
+        }
+        return TypeSignatureMappingKt.computeInternalName(classDescriptor, typeMappingConfiguration);
+    }
 }

compiler/builtins-serializer/src/org/jetbrains/kotlin/serialization/MetadataSerializer.kt

@@ -40,7 +40,6 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
-import org.jetbrains.kotlin.serialization.builtins.BuiltInsProtoBuf
 import org.jetbrains.kotlin.serialization.builtins.BuiltInsSerializerExtension
 import org.jetbrains.kotlin.serialization.deserialization.MetadataPackageFragment.Companion.DOT_METADATA_FILE_EXTENSION
 import org.jetbrains.kotlin.serialization.jvm.JvmPackageTable
@@ -142,11 +141,11 @@ open class MetadataSerializer(private val dependOnOldBuiltIns: Boolean) {
     protected inner class PackageSerializer(
             private val classes: Collection<DeclarationDescriptor>,
             private val members: Collection<DeclarationDescriptor>,
-            packageFqName: FqName,
+            private val packageFqName: FqName,
             private val destFile: File
     ) {
-        private val proto = BuiltInsProtoBuf.BuiltIns.newBuilder()
-        private val extension = BuiltInsSerializerExtension(packageFqName)
+        private val proto = ProtoBuf.PackageFragment.newBuilder()
+        private val extension = BuiltInsSerializerExtension()
 
         fun run() {
             serializeClasses(classes)
@@ -171,7 +170,7 @@ open class MetadataSerializer(private val dependOnOldBuiltIns: Boolean) {
         }
 
         private fun serializeMembers(members: Collection<DeclarationDescriptor>) {
-            proto.`package` = DescriptorSerializer.createTopLevel(extension).packagePartProto(members).build()
+            proto.`package` = DescriptorSerializer.createTopLevel(extension).packagePartProto(packageFqName, members).build()
         }
 
         private fun serializeStringTable() {

compiler/builtins-serializer/src/org/jetbrains/kotlin/serialization/builtins/BuiltInsSerializerExtension.kt

@@ -17,16 +17,8 @@
 package org.jetbrains.kotlin.serialization.builtins
 
 import org.jetbrains.kotlin.builtins.BuiltInSerializerProtocol
-import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.serialization.KotlinSerializerExtensionBase
-import org.jetbrains.kotlin.serialization.ProtoBuf
 
-class BuiltInsSerializerExtension(
-        private val packageFqName: FqName
-) : KotlinSerializerExtensionBase(BuiltInSerializerProtocol) {
+class BuiltInsSerializerExtension : KotlinSerializerExtensionBase(BuiltInSerializerProtocol) {
     override fun shouldUseTypeTable(): Boolean = true
-
-    override fun serializePackage(proto: ProtoBuf.Package.Builder) {
-        proto.setExtension(BuiltInsProtoBuf.packageFqName, stringTable.getPackageFqNameIndex(packageFqName))
-    }
 }

compiler/builtins-serializer/src/org/jetbrains/kotlin/serialization/builtins/run.kt

@@ -16,8 +16,6 @@
 
 package org.jetbrains.kotlin.serialization.builtins
 
-import com.intellij.util.concurrency.AppExecutorUtil
-import com.intellij.util.concurrency.AppScheduledExecutorService
 import java.io.File
 
 fun main(args: Array<String>) {
@@ -37,19 +35,13 @@ found top-level declarations to <destination dir> (*.kotlin_builtins files)"""
 
     val destDir = File(args[0])
 
-    val srcDirs = args.drop(1).map { File(it) }
+    val srcDirs = args.drop(1).map(::File)
     assert(srcDirs.isNotEmpty()) { "At least one source directory should be specified" }
 
-    val missing = srcDirs.filterNot { it.exists() }
+    val missing = srcDirs.filterNot(File::exists)
     assert(missing.isEmpty()) { "These source directories are missing: $missing" }
 
-    try {
-        BuiltInsSerializer(dependOnOldBuiltIns = false).serialize(destDir, srcDirs, listOf()) { totalSize, totalFiles ->
-            println("Total bytes written: $totalSize to $totalFiles files")
-        }
-    }
-    finally {
-        val service = AppExecutorUtil.getAppScheduledExecutorService() as AppScheduledExecutorService
-        service.shutdownAppScheduledExecutorService()
+    BuiltInsSerializer(dependOnOldBuiltIns = false).serialize(destDir, srcDirs, listOf()) { totalSize, totalFiles ->
+        println("Total bytes written: $totalSize to $totalFiles files")
     }
 }

compiler/cli/cli-common/cli-common.iml

@@ -9,8 +9,7 @@
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="module" module-name="util" />
     <orderEntry type="library" scope="PROVIDED" name="intellij-core" level="project" />
-    <orderEntry type="library" exported="" name="cli-parser" level="project" />
     <orderEntry type="library" name="jps" level="project" />
-    <orderEntry type="module" module-name="descriptor.loader.java" />
+    <orderEntry type="module" module-name="frontend.java" />
   </component>
 </module>

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.java

@@ -17,8 +17,8 @@
 package org.jetbrains.kotlin.cli.common.arguments;
 
 import com.intellij.util.SmartList;
-import com.sampullara.cli.Argument;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Argument;
 
 import java.io.Serializable;
 import java.util.List;
@@ -79,6 +79,9 @@ public abstract class CommonCompilerArguments implements Serializable {
     @Argument(value = "Xno-check-impl", description = "Do not check presence of 'impl' modifier in multi-platform projects")
     public boolean noCheckImpl;
 
+    @Argument(value = "Xskip-java-check", description = "Do not warn when running the compiler under Java 6 or 7")
+    public boolean noJavaVersionWarning;
+
     @Argument(value = "Xcoroutines=warn")
     public boolean coroutinesWarn;
 
@@ -96,6 +99,15 @@ public abstract class CommonCompilerArguments implements Serializable {
 
     public List<String> unknownExtraFlags = new SmartList<String>();
 
+    @NotNull
+    public static CommonCompilerArguments createDefaultInstance() {
+        DummyImpl arguments = new DummyImpl();
+        arguments.coroutinesEnable = false;
+        arguments.coroutinesWarn = true;
+        arguments.coroutinesError = false;
+        return arguments;
+    }
+
     @NotNull
     public String executableScriptFileName() {
         return "kotlinc";

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JSCompilerArguments.java

@@ -16,9 +16,9 @@
 
 package org.jetbrains.kotlin.cli.common.arguments;
 
-import com.sampullara.cli.Argument;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Argument;
 
 import static org.jetbrains.kotlin.cli.common.arguments.K2JsArgumentConstants.CALL;
 import static org.jetbrains.kotlin.cli.common.arguments.K2JsArgumentConstants.NO_CALL;
@@ -71,6 +71,13 @@ public class K2JSCompilerArguments extends CommonCompilerArguments {
     @ValueDescription("<path>")
     public String outputPostfix;
 
+    @NotNull
+    public static K2JSCompilerArguments createDefaultInstance() {
+        K2JSCompilerArguments arguments = new K2JSCompilerArguments();
+        arguments.moduleKind = K2JsArgumentConstants.MODULE_PLAIN;
+        return arguments;
+    }
+
     @Override
     @NotNull
     public String executableScriptFileName() {

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.java

@@ -16,8 +16,9 @@
 
 package org.jetbrains.kotlin.cli.common.arguments;
 
-import com.sampullara.cli.Argument;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Argument;
+import org.jetbrains.kotlin.config.JvmTarget;
 
 public class K2JVMCompilerArguments extends CommonCompilerArguments {
     public static final long serialVersionUID = 0L;
@@ -113,10 +114,16 @@ public class K2JVMCompilerArguments extends CommonCompilerArguments {
     // Paths to output directories for friend modules.
     public String[] friendPaths;
 
+    @NotNull
+    public static K2JVMCompilerArguments createDefaultInstance() {
+        K2JVMCompilerArguments arguments = new K2JVMCompilerArguments();
+        arguments.jvmTarget = JvmTarget.DEFAULT.getDescription();
+        return arguments;
+    }
+
     @Override
     @NotNull
     public String executableScriptFileName() {
         return "kotlinc-jvm";
     }
-
 }

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2MetadataCompilerArguments.java

@@ -16,7 +16,7 @@
 
 package org.jetbrains.kotlin.cli.common.arguments;
 
-import com.sampullara.cli.Argument;
+import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Argument;
 
 public class K2MetadataCompilerArguments extends CommonCompilerArguments {
     public static final long serialVersionUID = 0L;

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/argumentUtils.kt

@@ -17,7 +17,7 @@
 package org.jetbrains.kotlin.cli.common.arguments
 
 import com.intellij.util.xmlb.XmlSerializerUtil
-import com.sampullara.cli.Args
+import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Args
 import java.lang.reflect.Field
 import java.lang.reflect.Modifier
 import java.util.*
@@ -37,23 +37,23 @@ import java.util.*
     }
 }
 
-fun <T : Any> copyBean(bean: T) = copyFields(bean, bean.javaClass.newInstance(), true, collectFieldsToCopy(bean.javaClass, false))
+fun <T : Any> copyBean(bean: T) = copyFields(bean, bean::class.java.newInstance(), true, collectFieldsToCopy(bean::class.java, false))
 
 fun <From : Any, To : From> mergeBeans(from: From, to: To): To {
     // TODO: rewrite when updated version of com.intellij.util.xmlb is available on TeamCity
-    return copyFields(from, XmlSerializerUtil.createCopy(to), false, collectFieldsToCopy(from.javaClass, false))
+    return copyFields(from, XmlSerializerUtil.createCopy(to), false, collectFieldsToCopy(from::class.java, false))
 }
 
-fun <From : Any, To : Any> copyInheritedFields(from: From, to: To) = copyFields(from, to, true, collectFieldsToCopy(from.javaClass, true))
+fun <From : Any, To : Any> copyInheritedFields(from: From, to: To) = copyFields(from, to, true, collectFieldsToCopy(from::class.java, true))
 
 fun <From : Any, To : Any> copyFieldsSatisfying(from: From, to: To, predicate: (Field) -> Boolean) =
-        copyFields(from, to, true, collectFieldsToCopy(from.javaClass, false).filter(predicate))
+        copyFields(from, to, true, collectFieldsToCopy(from::class.java, false).filter(predicate))
 
 private fun <From : Any, To : Any> copyFields(from: From, to: To, deepCopyWhenNeeded: Boolean, fieldsToCopy: List<Field>): To {
     if (from == to) return to
 
     for (fromField in fieldsToCopy) {
-        val toField = to.javaClass.getField(fromField.name)
+        val toField = to::class.java.getField(fromField.name)
         val fromValue = fromField.get(from)
         toField.set(to, if (deepCopyWhenNeeded) fromValue?.copyValueIfNeeded() else fromValue)
     }
@@ -72,14 +72,14 @@ private fun Any.copyValueIfNeeded(): Any {
         is DoubleArray -> Arrays.copyOf(this, size)
         is BooleanArray -> Arrays.copyOf(this, size)
 
-        is Array<*> -> java.lang.reflect.Array.newInstance(javaClass.componentType, size).apply {
+        is Array<*> -> java.lang.reflect.Array.newInstance(this::class.java.componentType, size).apply {
             this as Array<Any?>
             (this@copyValueIfNeeded as Array<Any?>).forEachIndexed { i, value -> this[i] = value?.copyValueIfNeeded() }
         }
 
-        is MutableCollection<*> -> (this as Collection<Any?>).mapTo(javaClass.newInstance() as MutableCollection<Any?>) { it?.copyValueIfNeeded() }
+        is MutableCollection<*> -> (this as Collection<Any?>).mapTo(this::class.java.newInstance() as MutableCollection<Any?>) { it?.copyValueIfNeeded() }
 
-        is MutableMap<*, *> -> (javaClass.newInstance() as MutableMap<Any?, Any?>).apply {
+        is MutableMap<*, *> -> (this::class.java.newInstance() as MutableMap<Any?, Any?>).apply {
             for ((k, v) in this@copyValueIfNeeded.entries) {
                 put(k?.copyValueIfNeeded(), v?.copyValueIfNeeded())
             }
@@ -89,7 +89,7 @@ private fun Any.copyValueIfNeeded(): Any {
     }
 }
 
-private fun collectFieldsToCopy(clazz: Class<*>, inheritedOnly: Boolean): List<Field> {
+fun collectFieldsToCopy(clazz: Class<*>, inheritedOnly: Boolean): List<Field> {
     val fromFields = ArrayList<Field>()
 
     var currentClass: Class<*>? = if (inheritedOnly) clazz.superclass else clazz