OptIn ExperimentalNativeApi

compiler/testData/codegen/box/assert/alwaysEnable.kt

@@ -5,6 +5,8 @@
 // ASSERTIONS_MODE: always-enable
 // WITH_STDLIB
 
+@file:Suppress("OPT_IN_USAGE_ERROR") // ExperimentalNativeApi is defined only in Native
+
 fun checkTrue(): Boolean {
     var hit = false
     val l = { hit = true; true }

compiler/testData/codegen/box/regressions/kt2246.kt

@@ -6,6 +6,7 @@
 
 // WITH_STDLIB
 
+@Suppress("OPT_IN_USAGE_ERROR") // ExperimentalNativeApi is defined only in Native
 fun box(): String {
   kotlin.assert(true)
   return "OK"

compiler/testData/codegen/box/volatile/messagePassing.kt

@@ -10,6 +10,7 @@ import kotlin.concurrent.*
 var y = -1
 
 fun box() : String {
+    @OptIn(kotlin.experimental.ExperimentalNativeApi::class)
     if (Platform.memoryModel != MemoryModel.EXPERIMENTAL) {
         // The test doesn't make sense for legacy mm, you can't have anything non-atomic to protect with @Volatile var
         return "OK"