Made -Xfake-override-validator off by default

Deprected -Xdisable-fake-override-validator

(cherry picked from commit 0abe4e46c497645b07e9e55088135813bd1a7437)

kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt

@@ -248,7 +248,7 @@ class K2Native : CLICompiler<K2NativeCompilerArguments>() {
                 parseShortModuleName(arguments, configuration, outputKind)?.let {
                     put(SHORT_MODULE_NAME, it)
                 }
-                put(DISABLE_FAKE_OVERRIDE_VALIDATOR, arguments.disableFakeOverrideValidator)
+                put(FAKE_OVERRIDE_VALIDATOR, arguments.fakeOverrideValidator)
                 putIfNotNull(PRE_LINK_CACHES, parsePreLinkCachesValue(configuration, arguments.preLinkCaches))
                 putIfNotNull(OVERRIDE_KONAN_PROPERTIES, parseOverrideKonanProperties(arguments, configuration))
                 put(DESTROY_RUNTIME_MODE, when (arguments.destroyRuntimeMode) {

kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2NativeCompilerArguments.kt

@@ -142,9 +142,12 @@ class K2NativeCompilerArguments : CommonCompilerArguments() {
     )
     var exportedLibraries: Array<String>? = null
 
-    @Argument(value="-Xdisable-fake-override-validator", description = "Disable IR fake override validator")
+    @Argument(value="-Xdisable-fake-override-validator", description = "This option is deprecated")
     var disableFakeOverrideValidator: Boolean = false
 
+    @Argument(value="-Xfake-override-validator", description = "Enable IR fake override validator")
+    var fakeOverrideValidator: Boolean = false
+
     @Argument(
             value = "-Xframework-import-header",
             valueDescription = "<header>",

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanConfigurationKeys.kt

@@ -16,8 +16,8 @@ class KonanConfigKeys {
                 = CompilerConfigurationKey.create("check dependencies and download the missing ones")
         val DEBUG: CompilerConfigurationKey<Boolean>
                 = CompilerConfigurationKey.create("add debug information")
-        val DISABLE_FAKE_OVERRIDE_VALIDATOR: CompilerConfigurationKey<Boolean>
+        val FAKE_OVERRIDE_VALIDATOR: CompilerConfigurationKey<Boolean>
-                = CompilerConfigurationKey.create("disable fake override validator")
+                = CompilerConfigurationKey.create("fake override validator")
         val DISABLED_PHASES: CompilerConfigurationKey<List<String>> 
                 = CompilerConfigurationKey.create("disable backend phases")
         val BITCODE_EMBEDDING_MODE: CompilerConfigurationKey<BitcodeEmbedding.Mode>

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/PsiToIr.kt

@@ -175,7 +175,7 @@ internal fun Context.psiToIr(
 
     val modules = if (isProducingLibrary) emptyMap() else (irDeserializer as KonanIrLinker).modules
 
-    if (!config.configuration.getBoolean(KonanConfigKeys.DISABLE_FAKE_OVERRIDE_VALIDATOR)) {
+    if (config.configuration.getBoolean(KonanConfigKeys.FAKE_OVERRIDE_VALIDATOR)) {
         val fakeOverrideChecker = FakeOverrideChecker(KonanManglerIr, KonanManglerDesc)
         modules.values.forEach { fakeOverrideChecker.check(it) }
     }