JVM_IR indy-SAM conversions, 1st passing tests

KT-44278 KT-26060 KT-42621

compiler/config.jvm/src/org/jetbrains/kotlin/config/JVMConfigurationKeys.java

@@ -114,6 +114,9 @@ public class JVMConfigurationKeys {
     public static final CompilerConfigurationKey<JvmStringConcat> STRING_CONCAT =
             CompilerConfigurationKey.create("Specifies string concatenation scheme");
 
+    public static final CompilerConfigurationKey<JvmSamConversions> SAM_CONVERSIONS =
+            CompilerConfigurationKey.create("SAM conversions code generation scheme");
+
     public static final CompilerConfigurationKey<List<String>> KLIB_PATHS =
             CompilerConfigurationKey.create("Paths to .klib libraries");
 

compiler/config.jvm/src/org/jetbrains/kotlin/config/JvmSamConversions.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.config
+
+enum class JvmSamConversions(
+    val description: String,
+    val minJvmTarget: JvmTarget
+) {
+    CLASS("class", JvmTarget.JVM_1_6),
+    INDY("indy", JvmTarget.JVM_1_8),
+    ;
+
+    companion object {
+        val DEFAULT = CLASS
+
+        @JvmStatic
+        fun fromString(string: String?) =
+            values().find { it.description == string }
+    }
+}