swiftlang · zoecarver · Apr 8, 2022 · Apr 7, 2022
@@ -74,7 +74,7 @@ function(add_swift_compiler_modules_library name)
 
   set(swift_compile_options
       "-Xfrontend" "-validate-tbd-against-ir=none"
-      "-Xfrontend" "-enable-cxx-interop"
+      "-Xfrontend" "-enable-experimental-cxx-interop"
       "-Xcc" "-UIBOutlet" "-Xcc" "-UIBAction" "-Xcc" "-UIBInspectable")
 
   if(CMAKE_BUILD_TYPE STREQUAL Debug)

@@ -118,7 +118,7 @@ targets.append(
     path: "utils",
     sources: ["main.swift"],
     swiftSettings: [.unsafeFlags(["-Xfrontend",
-                                  "-enable-cxx-interop",
+                                  "-enable-experimental-cxx-interop",
                                   "-I",
                                   "utils/CxxTests"])]))
 
@@ -157,7 +157,7 @@ targets += cxxSingleSourceLibraries.map { name in
     path: "cxx-source",
     sources: ["\(name).swift"],
     swiftSettings: [.unsafeFlags(["-Xfrontend",
-                                  "-enable-cxx-interop",
+                                  "-enable-experimental-cxx-interop",
                                   "-I",
                                   "utils/CxxTests"])])
 }

@@ -478,10 +478,10 @@ function (swift_benchmark_compile_archopts)
       list(APPEND SWIFT_BENCH_OBJFILES "${objfile}")
       list(APPEND bench_library_swiftmodules "${swiftmodule}")
 
-      # Only set "enable-cxx-interop" for tests in the "cxx-source" directory.
+      # Only set "enable-experimental-cxx-interop" for tests in the "cxx-source" directory.
       set(cxx_options "")
       if ("${module_name_path}" MATCHES ".*cxx-source/.*")
-        list(APPEND cxx_options "-Xfrontend" "-enable-cxx-interop" "-I" "${srcdir}/utils/CxxTests/")
+        list(APPEND cxx_options "-Xfrontend" "-enable-experimental-cxx-interop" "-I" "${srcdir}/utils/CxxTests/")
       endif()
 
       if ("${bench_flags}" MATCHES "-whole-module.*")
@@ -590,7 +590,7 @@ function (swift_benchmark_compile_archopts)
       "-whole-module-optimization"
       "-emit-module" "-module-name" "${module_name}"
       "-I" "${objdir}"
-      "-Xfrontend" "-enable-cxx-interop"
+      "-Xfrontend" "-enable-experimental-cxx-interop"
       "-I" "${srcdir}/utils/CxxTests/"
       "-o" "${objdir}/${module_name}.o"
       "${source}")

diff --git a/docs/CppInteroperability/GettingStartedWithC++Interop.md b/docs/CppInteroperability/GettingStartedWithC++Interop.md
@@ -34,12 +34,12 @@ module Cxx {
 Add the C++ module to the include path and enable C++ interop:
 - Navigate to your project directory 
 - In `Project` navigate to `Build Settings` -> `Swift Compiler`
-- Under `Custom Flags` -> `Other Swift Flags` add`-Xfrontend -enable-cxx-interop`
+- Under `Custom Flags` -> `Other Swift Flags` add`-Xfrontend -enable-experimental-cxx-interop`
 - Under `Search Paths` -> `Import Paths` add your search path to the C++ module (i.e, `./ProjectName/Cxx`). Repeat this step in `Other Swift Flags` 
 
 ```
 //Add to Other Swift Flags and Import Paths respectively
--Xfrontend -enable-cxx-interop 
+-Xfrontend -enable-experimental-cxx-interop 
 -I./ProjectName/Cxx
 ```
 
@@ -88,7 +88,7 @@ After creating your Swift package project, follow the steps [Creating a Module t
 - Swift code will be in `Sources/CxxInterop` called `main.swift`
 - C++ source code follows the example shown in [Creating a Module to contain your C++ source code](#creating-a-module-to-contain-your-c-source-code)
 - Under targets, add the name of your C++ module and the directory containing the Swift code as a target.
-- In the target defining your Swift target, add a`dependencies` to the C++ Module, the `path`, `source`, and `swiftSettings` with `unsafeFlags` with the source to the C++ Module, and enable `-enable-cxx-interop`
+- In the target defining your Swift target, add a`dependencies` to the C++ Module, the `path`, `source`, and `swiftSettings` with `unsafeFlags` with the source to the C++ Module, and enable `-enable-experimental-cxx-interop`
 
 ```
 //In Package Manifest
@@ -118,7 +118,7 @@ let package = Package(
             sources: [ "main.swift" ],
             swiftSettings: [.unsafeFlags([
                 "-I", "Sources/Cxx",
-                "-Xfrontend", "-enable-cxx-interop",
+                "-Xfrontend", "-enable-experimental-cxx-interop",
             ])]
         ),
     ]
@@ -151,7 +151,7 @@ After creating your project follow the steps [Creating a Module to contain your
 - Create a `CMakeLists.txt` file and configure for your project
 - In`add_library` invoke `cxx-support` with the path to the C++ implementation file
 - Add the `target_include_directories` with `cxx-support` and path to the C++ Module `${CMAKE_SOURCE_DIR}/Sources/Cxx`
-- Add the `add_executable` to the specific files/directory you would like to generate source, with`SHELL:-Xfrontend -enable-cxx-interop`.
+- Add the `add_executable` to the specific files/directory you would like to generate source, with`SHELL:-Xfrontend -enable-experimental-cxx-interop`.
 - In the example below we will be following the file structure used in [Creating a Swift Package](#Creating-a-Swift-Package) 
 
 ```
@@ -176,7 +176,7 @@ target_include_directories(cxx-support PUBLIC
 
 add_executable(CxxInterop ./Sources/CxxInterop/main.swift)
 target_compile_options(CxxInterop PRIVATE
-  "SHELL:-Xfrontend -enable-cxx-interop"
+  "SHELL:-Xfrontend -enable-experimental-cxx-interop"
 target_link_libraries(CxxInterop PRIVATE cxx-support)
 
 ```

@@ -823,8 +823,8 @@ def emit_sorted_sil : Flag<["-"], "emit-sorted-sil">,
 def emit_syntax : Flag<["-"], "emit-syntax">,
   HelpText<"Parse input file(s) and emit the Syntax tree(s) as JSON">, ModeOpt;
 
-def enable_cxx_interop :
-  Flag<["-"], "enable-cxx-interop">,
+def enable_experimental_cxx_interop :
+  Flag<["-"], "enable-experimental-cxx-interop">,
   HelpText<"Enable C++ interop code generation and config directives">,
   Flags<[FrontendOption, HelpHidden]>;
 

@@ -608,10 +608,6 @@ def enable_experimental_concise_pound_file : Flag<["-"],
   Flags<[FrontendOption, ModuleInterfaceOption]>,
   HelpText<"Enable experimental concise '#file' identifier">;
 
-def enable_experimental_cxx_interop :
-  Flag<["-"], "enable-experimental-cxx-interop">,
-  HelpText<"Allow importing C++ modules into Swift (experimental feature)">;
-
 def experimental_cxx_stdlib :
   Separate<["-"], "experimental-cxx-stdlib">,
   HelpText<"C++ standard library to use; forwarded to Clang's -stdlib flag">;

@@ -190,7 +190,7 @@ void ToolChain::addCommonFrontendArgs(const OutputInfo &OI,
 
   // Add flags for C++ interop.
   if (inputArgs.hasArg(options::OPT_enable_experimental_cxx_interop)) {
-    arguments.push_back("-enable-cxx-interop");
+    arguments.push_back("-enable-experimental-cxx-interop");
   }
   if (const Arg *arg =
           inputArgs.getLastArg(options::OPT_experimental_cxx_stdlib)) {

@@ -757,7 +757,7 @@ static bool ParseLangArgs(LangOptions &Opts, ArgList &Args,
     Opts.ClangTarget = llvm::Triple(A->getValue());
   }
 
-  Opts.EnableCXXInterop |= Args.hasArg(OPT_enable_cxx_interop);
+  Opts.EnableCXXInterop |= Args.hasArg(OPT_enable_experimental_cxx_interop);
   Opts.EnableObjCInterop =
       Args.hasFlag(OPT_enable_objc_interop, OPT_disable_objc_interop,
                    Target.isOSDarwin());

@@ -1,10 +1,10 @@
-// RUN: %swiftc_driver -driver-print-jobs -target x86_64-apple-macosx10.9 %s -enable-experimental-cxx-interop 2>^1 | %FileCheck -check-prefix ENABLE %s
+// RUN: %swiftc_driver -driver-print-jobs -target x86_64-apple-macosx10.9 %s -Xfrontend -enable-experimental-cxx-interop 2>^1 | %FileCheck -check-prefix ENABLE %s
 
-// RUN: %swiftc_driver -driver-print-jobs -target x86_64-apple-macosx10.9 %s -enable-experimental-cxx-interop -experimental-cxx-stdlib libc++ 2>^1 | %FileCheck -check-prefix STDLIB %s
+// RUN: %swiftc_driver -driver-print-jobs -target x86_64-apple-macosx10.9 %s -Xfrontend -enable-experimental-cxx-interop -experimental-cxx-stdlib libc++ 2>^1 | %FileCheck -check-prefix STDLIB %s
 
 // ENABLE: swift
-// ENABLE: -enable-cxx-interop
+// ENABLE: -enable-experimental-cxx-interop
 
 // STDLIB: swift
-// STDLIB-DAG: -enable-cxx-interop
+// STDLIB-DAG: -enable-experimental-cxx-interop
 // STDLIB-DAG: -Xcc -stdlib=libc++
@@ -452,7 +452,7 @@
 // IOS-no-cxx-interop-NOT: -lc++
 
 // IOS-cxx-interop-libcxx: swift
-// IOS-cxx-interop-libcxx-DAG: -enable-cxx-interop
+// IOS-cxx-interop-libcxx-DAG: -enable-experimental-cxx-interop
 // IOS-cxx-interop-libcxx-DAG: -o [[OBJECTFILE:.*]]
 
 // IOS-cxx-interop-libcxx: {{(bin/)?}}ld{{"? }}
@@ -465,7 +465,7 @@
 // LINUX-cxx-interop-NOT: -stdlib
 
 // LINUX-cxx-interop-libcxx: swift
-// LINUX-cxx-interop-libcxx-DAG: -enable-cxx-interop
+// LINUX-cxx-interop-libcxx-DAG: -enable-experimental-cxx-interop
 // LINUX-cxx-interop-libcxx-DAG: -o [[OBJECTFILE:.*]]
 
 // LINUX-cxx-interop-libcxx: clang++{{(\.exe)?"? }}
@@ -476,7 +476,7 @@
 // WINDOWS-cxx-interop-NOT: -stdlib
 
 // WINDOWS-cxx-interop-libcxx: swift
-// WINDOWS-cxx-interop-libcxx-DAG: -enable-cxx-interop
+// WINDOWS-cxx-interop-libcxx-DAG: -enable-experimental-cxx-interop
 // WINDOWS-cxx-interop-libcxx-DAG: -o [[OBJECTFILE:.*]]
 
 // WINDOWS-cxx-interop-libcxx: clang++{{(\.exe)?"? }}

@@ -1,5 +1,5 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=SomeModule -I %S/Inputs -source-filename=x -enable-cxx-interop -enable-objc-interop | %FileCheck -check-prefix=CHECK-IDE-TEST %s
-// RUN: %swift-frontend -c -enable-cxx-interop -enable-objc-interop -I %S/Inputs %s -o - -emit-sil | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=SomeModule -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop -enable-objc-interop | %FileCheck -check-prefix=CHECK-IDE-TEST %s
+// RUN: %swift-frontend -c -enable-experimental-cxx-interop -enable-objc-interop -I %S/Inputs %s -o - -emit-sil | %FileCheck %s
 
 import SomeModule
 

@@ -1,7 +1,7 @@
 // Test module interface produced for C++ access specifiers test.
 // In particular, we don't want any of the private members showing up here.
 
-// RUN: %target-swift-ide-test -print-module -module-to-print=AccessSpecifiers -I %S/Inputs -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=AccessSpecifiers -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // CHECK:      struct PublicPrivate {
 // CHECK-NEXT:   init()

@@ -1,7 +1,7 @@
 // Test that C++ access specifiers are honored, i.e. private members aren't
 // imported.
 
-// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -enable-cxx-interop
+// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -enable-experimental-cxx-interop
 
 import AccessSpecifiers
 

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend %s -c -enable-cxx-interop -I %S/Inputs
+// RUN: %target-swift-frontend %s -c -enable-experimental-cxx-interop -I %S/Inputs
 //
 // REQUIRES: objc_interop
 

@@ -1,8 +1,8 @@
 // Target-specific tests for C++ copy constructor code generation.
 
-// RUN: %swift -module-name Swift -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
-// RUN: %swift -module-name Swift -target armv7-none-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
-// RUN: %swift -module-name Swift -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
+// RUN: %swift -module-name Swift -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
+// RUN: %swift -module-name Swift -target armv7-none-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
+// RUN: %swift -module-name Swift -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
 
 import Constructors
 import TypeClassification

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=Constructors -I %S/Inputs -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=Constructors -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // Make sure we don't import non-copyable types because we will have no way to
 // represent and copy/move these in swift with correct semantics.

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-experimental-cxx-interop)
 //
 // REQUIRES: executable_test
 

@@ -1,8 +1,8 @@
 // Target-specific tests for C++ constructor call code generation.
 
-// RUN: %swift -module-name Swift -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
-// RUN: %swift -module-name Swift -target armv7-unknown-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
-// RUN: %swift -module-name Swift -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
+// RUN: %swift -module-name Swift -target x86_64-apple-macosx10.9 -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_X64
+// RUN: %swift -module-name Swift -target armv7-unknown-linux-androideabi -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=ITANIUM_ARM
+// RUN: %swift -module-name Swift -target x86_64-unknown-windows-msvc -dump-clang-diagnostics -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s -parse-stdlib -parse-as-library -disable-legacy-type-info | %FileCheck %s -check-prefix=MICROSOFT_X64
 
 import Constructors
 import TypeClassification

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=Constructors -I %S/Inputs/ -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=Constructors -I %S/Inputs/ -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // CHECK:      struct ExplicitDefaultConstructor {
 // CHECK-NEXT:   init()

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -I %S/Inputs -enable-cxx-interop -emit-ir %s | %FileCheck %s
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s | %FileCheck %s
 
 // REQUIRES: CPU=x86_64
 // REQUIRES: objc_interop

@@ -1,7 +1,7 @@
 // Test that Objective-C types passed to a C++ constructor are bridged
 // correctly.
 
-// RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk) -print-module -module-to-print=ConstructorsObjC -I %S/Inputs/ -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test(mock-sdk: %clang-importer-sdk) -print-module -module-to-print=ConstructorsObjC -I %S/Inputs/ -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // REQUIRES: objc_interop
 

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -I %S/Inputs -enable-cxx-interop -emit-sil %s | %FileCheck %s
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -I %S/Inputs -enable-experimental-cxx-interop -emit-sil %s | %FileCheck %s
 
 // REQUIRES: objc_interop
 import Foundation

@@ -1,4 +1,4 @@
-// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -enable-cxx-interop
+// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -enable-experimental-cxx-interop
 
 import Constructors
 

@@ -1,4 +1,4 @@
-// RUN: %swift -I %S/Inputs -enable-cxx-interop -emit-ir %s | %FileCheck %s
+// RUN: %swift -I %S/Inputs -enable-experimental-cxx-interop -emit-ir %s | %FileCheck %s
 
 import Destructors
 

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -enable-cxx-interop -I %S/Inputs %s -emit-ir | %FileCheck %s
+// RUN: %target-swift-frontend -enable-experimental-cxx-interop -I %S/Inputs %s -emit-ir | %FileCheck %s
 
 import Destructors
 

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=DictionaryOfNSStrings -I %S/Inputs/ -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=DictionaryOfNSStrings -I %S/Inputs/ -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // REQUIRES: objc_interop
 

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-experimental-cxx-interop)
 // REQUIRES: executable_test
 
 import StdlibUnittest

@@ -1,4 +1,4 @@
-// RUN: %target-swift-emit-ir %s -I %S/Inputs -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-emit-ir %s -I %S/Inputs -enable-experimental-cxx-interop | %FileCheck %s
 
 import Extensions
 

@@ -1,4 +1,4 @@
-// RUN: %target-typecheck-verify-swift -I %S/Inputs -enable-cxx-interop
+// RUN: %target-typecheck-verify-swift -I %S/Inputs -enable-experimental-cxx-interop
 
 import Extensions
 

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=Fields -I %S/Inputs -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=Fields -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // CHECK:      struct HasThreeFields {
 // CHECK-NEXT:   init()

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-experimental-cxx-interop)
 //
 // REQUIRES: executable_test
 //

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=Functions -I %S/Inputs -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=Functions -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // CHECK:      struct NonTrivial {
 // CHECK-NEXT:   init()

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -enable-experimental-cxx-interop)
 //
 // REQUIRES: executable_test
 

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=SubTypes -I %S/Inputs -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=SubTypes -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // CHECK:      struct Base {
 // CHECK-NEXT:   init()

@@ -1,4 +1,4 @@
-// RUN: %target-swift-ide-test -print-module -module-to-print=TypeAliases -I %S/Inputs -source-filename=x -enable-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=TypeAliases -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
 
 // CHECK:      struct Base {
 // CHECK-NEXT:   init()

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
 //
 // REQUIRES: executable_test
 

@@ -1,4 +1,4 @@
-// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
 //
 // REQUIRES: executable_test