Revert "[light classes] drop old light classes and backend: iteration #1"

This reverts commit 3cb2df9360.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -13,6 +13,7 @@ import com.intellij.psi.search.PsiSearchScopeUtil
 import com.intellij.util.SmartList
 import org.jetbrains.kotlin.asJava.KotlinAsJavaSupport
 import org.jetbrains.kotlin.asJava.classes.*
+import org.jetbrains.kotlin.config.JvmAnalysisFlags
 import org.jetbrains.kotlin.descriptors.PackageViewDescriptor
 import org.jetbrains.kotlin.fileClasses.javaFileFacadeFqName
 import org.jetbrains.kotlin.load.java.components.FilesByFacadeFqNameIndexer
@@ -108,9 +109,11 @@ class CliKotlinAsJavaSupport(
         ).mapNotNull { member -> (member as? PackageViewDescriptor)?.fqName }
     }
 
-    override fun getLightClass(classOrObject: KtClassOrObject): KtLightClass? = KtLightClassForSourceDeclaration.create(classOrObject)
+    override fun getLightClass(classOrObject: KtClassOrObject): KtLightClass? =
+        KtLightClassForSourceDeclaration.create(classOrObject, traceHolder.languageVersionSettings.getFlag(JvmAnalysisFlags.jvmDefaultMode))
 
-    override fun getLightClassForScript(script: KtScript): KtLightClassForScript? = KtLightClassForScript.create(script)
+    override fun getLightClassForScript(script: KtScript): KtLightClassForScript? =
+        KtLightClassForScript.create(script)
 
     override fun findClassOrObjectDeclarations(fqName: FqName, searchScope: GlobalSearchScope): Collection<KtClassOrObject> {
         return ResolveSessionUtils.getClassDescriptorsByFqName(traceHolder.module, fqName).mapNotNull {
@@ -127,5 +130,6 @@ class CliKotlinAsJavaSupport(
         }.orEmpty()
     }
 
-    override fun createFacadeForSyntheticFile(facadeClassFqName: FqName, file: KtFile): PsiClass = error("Should not be called")
+    override fun createFacadeForSyntheticFile(facadeClassFqName: FqName, file: KtFile): PsiClass =
+        error("Should not be called")
 }

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

@@ -1,6 +1,17 @@
 /*
- * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ * Copyright 2010-2016 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.cli.jvm.compiler
@@ -19,6 +30,7 @@ import org.jetbrains.kotlin.asJava.classes.tryGetPredefinedName
 import org.jetbrains.kotlin.codegen.ClassBuilderMode
 import org.jetbrains.kotlin.codegen.JvmCodegenUtil
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper
+import org.jetbrains.kotlin.config.JvmAnalysisFlags
 import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
@@ -93,6 +105,9 @@ class CliLightClassGenerationSupport(
         return ultraLightSupport
     }
 
+    override val useUltraLightClasses: Boolean
+        get() = !KtUltraLightSupport.forceUsingOldLightClasses && !traceHolder.languageVersionSettings.getFlag(JvmAnalysisFlags.disableUltraLightClasses)
+
     override fun createDataHolderForClass(classOrObject: KtClassOrObject, builder: LightClassBuilder): LightClassDataHolder.ForClass {
         //force resolve companion for light class generation
         traceHolder.bindingContext.get(BindingContext.CLASS, classOrObject)?.companionObjectDescriptor