Added -Xdisable-fake-override-validator

(cherry picked from commit d921dc1f946114fcf4a4fbdb0bf3593c0b97b9a7)

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

@@ -249,6 +249,7 @@ class K2Native : CLICompiler<K2NativeCompilerArguments>() {
                 parseShortModuleName(arguments, configuration, outputKind)?.let {
                     put(SHORT_MODULE_NAME, it)
                 }
+                put(DISABLE_FAKE_OVERRIDE_VALIDATOR, arguments.disableFakeOverrideValidator)
             }
         }
     }

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

@@ -145,6 +145,9 @@ class K2NativeCompilerArguments : CommonCompilerArguments() {
     )
     var exportedLibraries: Array<String>? = null
 
+    @Argument(value="-Xdisable-fake-override-validator", description = "Disable IR fake override validator")
+    var disableFakeOverrideValidator: Boolean = false
+
     @Argument(
             value = "-Xframework-import-header",
             valueDescription = "<header>",

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

@@ -18,6 +18,8 @@ class KonanConfigKeys {
                 = CompilerConfigurationKey.create("compatible compiler versions")
         val DEBUG: CompilerConfigurationKey<Boolean>
                 = CompilerConfigurationKey.create("add debug information")
+        val DISABLE_FAKE_OVERRIDE_VALIDATOR: CompilerConfigurationKey<Boolean>
+                = CompilerConfigurationKey.create("disable fake override validator")
         val DISABLED_PHASES: CompilerConfigurationKey<List<String>> 
                 = CompilerConfigurationKey.create("disable backend phases")
         val BITCODE_EMBEDDING_MODE: CompilerConfigurationKey<BitcodeEmbedding.Mode>

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

@@ -254,8 +254,10 @@ internal val psiToIrPhase = konanUnitPhase(
             symbolTable.noUnboundLeft("Unbound symbols left after linker")
 
             module.acceptVoid(ManglerChecker(KonanManglerIr, Ir2DescriptorManglerAdapter(KonanManglerDesc)))
-            val fakeOverrideChecker = FakeOverrideChecker(KonanManglerIr, KonanManglerDesc)
-            linker.modules.values.forEach{ fakeOverrideChecker.check(it) }
+            if (!config.configuration.getBoolean(KonanConfigKeys.DISABLE_FAKE_OVERRIDE_VALIDATOR)) {
+                val fakeOverrideChecker = FakeOverrideChecker(KonanManglerIr, KonanManglerDesc)
+                linker.modules.values.forEach { fakeOverrideChecker.check(it) }
+            }
 
             irModule = module