Added -Xdisable-fake-override-validator

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JSCompilerArguments.kt

@@ -172,6 +172,9 @@ class K2JSCompilerArguments : CommonCompilerArguments() {
     @Argument(value = "-Xenable-js-scripting", description = "Enable experimental support of .kts files using K/JS (with -Xir only)")
     var enableJsScripting: Boolean by FreezableVar(false)
 
+    @Argument(value = "-Xdisable-fake-override-validator", description = "Disable IR fake override validator")
+    var disableFakeOverrideValidator: Boolean by FreezableVar(false)
+
     override fun checkIrSupport(languageVersionSettings: LanguageVersionSettings, collector: MessageCollector) {
         if (!isIrBackendEnabled()) return
 

compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/js/K2JsIrCompiler.kt

@@ -327,6 +327,7 @@ class K2JsIrCompiler : CLICompiler<K2JSCompilerArguments>() {
         }
 
         configuration.put(JSConfigurationKeys.PRINT_REACHABILITY_INFO, arguments.irDcePrintReachabilityInfo)
+        configuration.put(JSConfigurationKeys.DISABLE_FAKE_OVERRIDE_VALIDATOR, arguments.disableFakeOverrideValidator)
     }
 
     override fun executableScriptFileName(): String {

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/klib.kt

@@ -164,8 +164,10 @@ fun generateKLib(
     val moduleFragment = psi2IrContext.generateModuleFragmentWithPlugins(project, files, irLinker, expectDescriptorToSymbol)
 
     moduleFragment.acceptVoid(ManglerChecker(JsManglerIr, Ir2DescriptorManglerAdapter(JsManglerDesc)))
-    val fakeOverrideChecker = FakeOverrideChecker(JsManglerIr, JsManglerDesc)
-    irLinker.modules.forEach{ fakeOverrideChecker.check(it) }
+    if (!configuration.getBoolean(JSConfigurationKeys.DISABLE_FAKE_OVERRIDE_VALIDATOR)) {
+        val fakeOverrideChecker = FakeOverrideChecker(JsManglerIr, JsManglerDesc)
+        irLinker.modules.forEach { fakeOverrideChecker.check(it) }
+    }
 
     val moduleName = configuration[CommonConfigurationKeys.MODULE_NAME]!!
 
@@ -236,8 +238,10 @@ fun loadIr(
             val mangleChecker = ManglerChecker(JsManglerIr, Ir2DescriptorManglerAdapter(JsManglerDesc))
             moduleFragment.acceptVoid(mangleChecker)
 
-            val fakeOverrideChecker = FakeOverrideChecker(JsManglerIr, JsManglerDesc)
-            irLinker.modules.forEach{ fakeOverrideChecker.check(it) }
+            if (!configuration.getBoolean(JSConfigurationKeys.DISABLE_FAKE_OVERRIDE_VALIDATOR)) {
+                val fakeOverrideChecker = FakeOverrideChecker(JsManglerIr, JsManglerDesc)
+                irLinker.modules.forEach { fakeOverrideChecker.check(it) }
+            }
 
             irBuiltIns.knownBuiltins.forEach { it.acceptVoid(mangleChecker) }
 

js/js.frontend/src/org/jetbrains/kotlin/js/config/JSConfigurationKeys.java

@@ -83,4 +83,7 @@ public class JSConfigurationKeys {
 
     public static final CompilerConfigurationKey<Boolean> PRINT_REACHABILITY_INFO =
             CompilerConfigurationKey.create("print declarations' reachability info during performing DCE");
+
+    public static final CompilerConfigurationKey<Boolean> DISABLE_FAKE_OVERRIDE_VALIDATOR =
+            CompilerConfigurationKey.create("disable IR fake override validator");
 }