diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt
index d77c7180318..fdc26f61bf4 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt
@@ -34,9 +34,6 @@ import com.intellij.openapi.extensions.ExtensionsArea
 import com.intellij.openapi.fileTypes.PlainTextFileType
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Disposer
-import com.intellij.openapi.util.JDOMUtil
-import com.intellij.openapi.util.NotNullLazyValue
-import com.intellij.openapi.util.SystemInfo
 import com.intellij.openapi.util.io.FileUtilRt
 import com.intellij.openapi.util.text.StringUtil
 import com.intellij.openapi.vfs.*
@@ -57,7 +54,6 @@ import org.jetbrains.kotlin.asJava.LightClassGenerationSupport
 import org.jetbrains.kotlin.asJava.classes.FacadeCache
 import org.jetbrains.kotlin.asJava.finder.JavaElementFinder
 import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
-import org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension
 import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
 import org.jetbrains.kotlin.cli.common.CliModuleVisibilityManagerImpl
 import org.jetbrains.kotlin.cli.common.KOTLIN_COMPILER_ENVIRONMENT_KEEPALIVE_PROPERTY
@@ -108,10 +104,7 @@ import org.jetbrains.kotlin.resolve.lazy.declarations.CliDeclarationProviderFact
 import org.jetbrains.kotlin.resolve.lazy.declarations.DeclarationProviderFactoryService
 import org.jetbrains.kotlin.utils.PathUtil
 import java.io.File
-import java.lang.reflect.Field
-import java.lang.reflect.Modifier
 import java.util.zip.ZipFile
-import javax.xml.stream.XMLInputFactory
 
 class KotlinCoreEnvironment private constructor(
     val projectEnvironment: JavaCoreProjectEnvironment,
@@ -557,7 +550,8 @@ class KotlinCoreEnvironment private constructor(
             CollectAdditionalSourcesExtension.registerExtensionPoint(project)
             ExtraImportsProviderExtension.registerExtensionPoint(project)
             IrGenerationExtension.registerExtensionPoint(project)
-            PureIrGenerationExtension.registerExtensionPoint(project)
+            @Suppress("DEPRECATION_ERROR")
+            org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension.registerExtensionPoint(project)
             ScriptEvaluationExtension.registerExtensionPoint(project)
             ShellExtension.registerExtensionPoint(project)
             TypeResolutionInterceptor.registerExtensionPoint(project)
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/extensions/IrGenerationExtension.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/extensions/IrGenerationExtension.kt
index 39e37dd5726..5c8714f7928 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/extensions/IrGenerationExtension.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/extensions/IrGenerationExtension.kt
@@ -11,10 +11,8 @@ import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor
 import org.jetbrains.kotlin.ir.builders.IrGeneratorContext
-import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
-import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.util.IrExtensionGenerator
 import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.ir.util.TypeTranslator
@@ -41,9 +39,13 @@ interface IrGenerationExtension : IrExtensionGenerator {
 }
 
 // Extension point for plugins which run before any lowerings, but after the Ir has been constructed.
+@Deprecated("This is a temporary class which will be replaced with another extension mechanism soon.", level = DeprecationLevel.ERROR)
 interface PureIrGenerationExtension {
+    @Suppress("DEPRECATION_ERROR")
     companion object :
-        ProjectExtensionDescriptor<PureIrGenerationExtension>("org.jetbrains.kotlin.pureIrGenerationExtension", PureIrGenerationExtension::class.java)
+        ProjectExtensionDescriptor<PureIrGenerationExtension>(
+            "org.jetbrains.kotlin.pureIrGenerationExtension", PureIrGenerationExtension::class.java
+        )
 
     fun generate(
         moduleFragment: IrModuleFragment,
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendFacade.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendFacade.kt
index ec1b6ab6f63..c41b02780b3 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendFacade.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendFacade.kt
@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.backend.jvm
 import org.jetbrains.kotlin.backend.common.CodegenUtil
 import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
 import org.jetbrains.kotlin.backend.common.extensions.IrPluginContext
-import org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension
 import org.jetbrains.kotlin.backend.common.phaser.PhaseConfig
 import org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen
 import org.jetbrains.kotlin.backend.jvm.lower.MultifileFacadeFileEntry
@@ -106,7 +105,8 @@ object JvmBackendFacade {
             context.typeMapper.mapType(context.referenceClass(descriptor).defaultType)
         }
 
-        for (extension in PureIrGenerationExtension.getInstances(state.project)) {
+        @Suppress("DEPRECATION_ERROR")
+        for (extension in org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension.getInstances(state.project)) {
             extension.generate(irModuleFragment, context)
         }
 
diff --git a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ParcelableIrGeneratorExtension.kt b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ParcelableIrGeneratorExtension.kt
index 5f8adfd8f32..a58bab9f029 100644
--- a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ParcelableIrGeneratorExtension.kt
+++ b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/parcel/ParcelableIrGeneratorExtension.kt
@@ -8,10 +8,10 @@ package org.jetbrains.kotlin.android.parcel
 import org.jetbrains.kotlin.android.parcel.ir.AndroidSymbols
 import org.jetbrains.kotlin.android.parcel.ir.ParcelableIrTransformer
 import org.jetbrains.kotlin.backend.common.CommonBackendContext
-import org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 
-class ParcelableIrGeneratorExtension : PureIrGenerationExtension {
+@Suppress("DEPRECATION_ERROR")
+class ParcelableIrGeneratorExtension : org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension {
     override fun generate(moduleFragment: IrModuleFragment, context: CommonBackendContext) {
         ParcelableIrTransformer(context, AndroidSymbols(context, moduleFragment)).transform(moduleFragment)
     }
diff --git a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/AndroidComponentRegistrar.kt b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/AndroidComponentRegistrar.kt
index 23e50e263f1..198d9a1d742 100644
--- a/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/AndroidComponentRegistrar.kt
+++ b/plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/AndroidComponentRegistrar.kt
@@ -30,7 +30,6 @@ import org.jetbrains.kotlin.android.synthetic.res.AndroidVariant
 import org.jetbrains.kotlin.android.synthetic.res.CliAndroidLayoutXmlFileManager
 import org.jetbrains.kotlin.android.synthetic.res.CliAndroidPackageFragmentProviderExtension
 import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
-import org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension
 import org.jetbrains.kotlin.codegen.extensions.ClassBuilderInterceptorExtension
 import org.jetbrains.kotlin.codegen.extensions.ExpressionCodegenExtension
 import org.jetbrains.kotlin.compiler.plugin.*
@@ -41,8 +40,8 @@ import org.jetbrains.kotlin.container.useInstance
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.extensions.StorageComponentContainerContributor
 import org.jetbrains.kotlin.platform.TargetPlatform
-import org.jetbrains.kotlin.resolve.extensions.SyntheticResolveExtension
 import org.jetbrains.kotlin.platform.jvm.isJvm
+import org.jetbrains.kotlin.resolve.extensions.SyntheticResolveExtension
 import org.jetbrains.kotlin.resolve.jvm.extensions.PackageFragmentProviderExtension
 import org.jetbrains.kotlin.utils.decodePluginOptions
 
@@ -105,7 +104,10 @@ class AndroidComponentRegistrar : ComponentRegistrar {
     companion object {
         fun registerParcelExtensions(project: Project) {
             ExpressionCodegenExtension.registerExtension(project, ParcelableCodegenExtension())
-            PureIrGenerationExtension.registerExtension(project, ParcelableIrGeneratorExtension())
+            @Suppress("DEPRECATION_ERROR")
+            org.jetbrains.kotlin.backend.common.extensions.PureIrGenerationExtension.registerExtension(
+                project, ParcelableIrGeneratorExtension()
+            )
             SyntheticResolveExtension.registerExtension(project, ParcelableResolveExtension())
             ClassBuilderInterceptorExtension.registerExtension(project, ParcelableClinitClassBuilderInterceptorExtension())
         }