Generate 'DefaultImpls' for jvm 8 target only within compiler option

compiler/testData/cli/jvm/extraHelp.out

@@ -10,6 +10,7 @@ where advanced options include:
   -Xdump-declarations-to <path> Path to JSON file to dump Java to Kotlin declaration mappings
   -Xload-script-configs      Load script configuration files from project directory tree
   -Xsingle-module            Combine modules for source files and binary dependencies into a single module
+  -Xinterface-compatibility  Generate DefaultImpls classes for interfaces in JVM target bytecode version 1.8 for binary compatibility with 1.6
   -Xno-inline                Disable method inlining
   -Xrepeat <count>           Repeat compilation (for performance analysis)
   -Xplugin <path>            Load plugins from the given classpath

compiler/testData/codegen/java8/box/jvm8/reflection/propertyAnnotationsCompatibility.kt

@@ -0,0 +1,24 @@
+// JVM_TARGET: 1.8
+// WITH_REFLECT
+// KOTLIN_CONFIGURATION_FLAGS: +JVM.INTERFACE_COMPATIBILITY
+
+annotation class Property(val value: String)
+annotation class Accessor(val value: String)
+
+interface Z {
+    @Property("OK")
+    val z: String;
+        @Accessor("OK")
+        get() = "OK"
+}
+
+
+class Test : Z
+
+fun box() : String {
+    val value = (Z::z.annotations.single() as Property).value
+    if (value != "OK") return value
+    val forName = Class.forName("Z\$DefaultImpls")
+    val annotation = forName.getDeclaredMethod("z\$annotations").getAnnotation(Property::class.java)
+    return annotation.value
+}

compiler/testData/codegen/java8/writeFlags/defaultMethodCompatibility.kt

@@ -0,0 +1,25 @@
+// JVM_TARGET: 1.8
+// KOTLIN_CONFIGURATION_FLAGS: +JVM.INTERFACE_COMPATIBILITY
+
+
+interface Test {
+    fun test(): String {
+        return "OK"
+    }
+}
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test, test
+// FLAGS: ACC_PUBLIC
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test, test$defaultImpl
+// FLAGS: ACC_PUBLIC, ACC_STATIC, ACC_SYNTHETIC
+
+// TESTED_OBJECT_KIND: class
+// TESTED_OBJECTS: Test$DefaultImpls
+// FLAGS: ACC_PUBLIC, ACC_FINAL, ACC_SUPER
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test$DefaultImpls, test
+// FLAGS: ACC_PUBLIC, ACC_STATIC

compiler/testData/codegen/java8/writeFlags/defaultPropertyCompatibility.kt

@@ -0,0 +1,37 @@
+// JVM_TARGET: 1.8
+// KOTLIN_CONFIGURATION_FLAGS: +JVM.INTERFACE_COMPATIBILITY
+
+interface Test {
+    var z: String
+        get() = "OK"
+        set(value) {}
+}
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test, getZ
+// FLAGS: ACC_PUBLIC
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test, setZ
+// FLAGS: ACC_PUBLIC
+
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test, getZ$defaultImpl
+// FLAGS: ACC_PUBLIC, ACC_STATIC, ACC_SYNTHETIC
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test, setZ$defaultImpl
+// FLAGS: ACC_PUBLIC, ACC_STATIC, ACC_SYNTHETIC
+
+// TESTED_OBJECT_KIND: class
+// TESTED_OBJECTS: Test$DefaultImpls
+// FLAGS: ACC_PUBLIC, ACC_FINAL, ACC_SUPER
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test$DefaultImpls, getZ
+// FLAGS: ACC_PUBLIC, ACC_STATIC
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Test$DefaultImpls, setZ
+// FLAGS: ACC_PUBLIC, ACC_STATIC

compiler/testData/codegen/java8/writeFlags/interfaceAndDefaultImpls.kt

@@ -1,15 +0,0 @@
-// JVM_TARGET: 1.8
-
-interface Test {
-    fun a() {
-
-    }
-}
-
-// TESTED_OBJECT_KIND: class
-// TESTED_OBJECTS: Test$DefaultImpls
-// FLAGS: ACC_PUBLIC, ACC_FINAL, ACC_SUPER
-
-// TESTED_OBJECT_KIND: class
-// TESTED_OBJECTS: Test
-// FLAGS: ACC_PUBLIC, ACC_ABSTRACT, ACC_INTERFACE