Lowering extension point

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

@@ -64,6 +64,7 @@ import org.jetbrains.kotlin.asJava.KotlinAsJavaSupport
 import org.jetbrains.kotlin.asJava.LightClassGenerationSupport
 import org.jetbrains.kotlin.asJava.classes.KtLightClassForFacade
 import org.jetbrains.kotlin.asJava.finder.JavaElementFinder
+import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
 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
@@ -185,6 +186,7 @@ class KotlinCoreEnvironment private constructor(
         PreprocessedVirtualFileFactoryExtension.registerExtensionPoint(project)
         JsSyntheticTranslateExtension.registerExtensionPoint(project)
         CompilerConfigurationExtension.registerExtensionPoint(project)
+        IrGenerationExtension.registerExtensionPoint(project)
 
         val messageCollector = configuration.get(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
 

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/extensions/IrGenerationExtension.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.backend.common.extensions
+
+import org.jetbrains.kotlin.backend.common.BackendContext
+import org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor
+import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.resolve.BindingContext
+
+interface IrGenerationExtension {
+    companion object :
+        ProjectExtensionDescriptor<IrGenerationExtension>("org.jetbrains.kotlin.irGenerationExtension", IrGenerationExtension::class.java)
+
+    fun generate(
+        file: IrFile,
+        backendContext: BackendContext,
+        bindingContext: BindingContext
+    )
+}

idea/src/META-INF/extensions/compiler.xml

@@ -14,6 +14,9 @@
         <extensionPoint qualifiedName="org.jetbrains.kotlin.jsSyntheticTranslateExtension"
                         interface="org.jetbrains.kotlin.js.translate.extensions.JsSyntheticTranslateExtension"
                         area="IDEA_PROJECT"/>
+        <extensionPoint qualifiedName="org.jetbrains.kotlin.irGenerationExtension"
+                        interface="org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension"
+                        area="IDEA_PROJECT"/>
         <extensionPoint qualifiedName="org.jetbrains.kotlin.simpleNameReferenceExtension"
                         interface="org.jetbrains.kotlin.plugin.references.SimpleNameReferenceExtension"
                         area="IDEA_PROJECT"/>