Merge pull request #71836 from apple/egorzhdan/cxx-tests-swift-6

[cxx-interop] Run tests with `swift-6` compat mode

Author: egorzhdan

test/Interop/Cxx/class/conforms-to.swift

@@ -2,6 +2,7 @@
 // RUN: %target-swift-frontend %S/Inputs/conforms-to-imported.swift -module-name ImportedModule -emit-module -emit-module-path %t/ImportedModule.swiftmodule
 
 // RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %t -I %S/Inputs -module-name SwiftTest -enable-experimental-cxx-interop
+// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %t -I %S/Inputs -module-name SwiftTest -cxx-interoperability-mode=swift-6 -D UPCOMING_SWIFT
 // RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %t -I %S/Inputs -module-name SwiftTest -cxx-interoperability-mode=upcoming-swift -D UPCOMING_SWIFT
 
 import ConformsTo

test/Interop/Cxx/class/inheritance/using-base-members-module-interface.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-ide-test -print-module -module-to-print=UsingBaseMembers -I %S/Inputs -source-filename=x -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=UsingBaseMembers -I %S/Inputs -source-filename=x -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
 
 // CHECK: struct PublicBase {

test/Interop/Cxx/class/inheritance/using-base-members-typechecker.swift

@@ -1,3 +1,4 @@
+// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -cxx-interoperability-mode=swift-6
 // RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -cxx-interoperability-mode=upcoming-swift
 
 import UsingBaseMembers

test/Interop/Cxx/class/inheritance/using-base-members.swift

@@ -1,3 +1,4 @@
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -Xfrontend -cxx-interoperability-mode=upcoming-swift)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/class/inheritance/virtual-methods-module-interface.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-ide-test -print-module -cxx-interoperability-mode=swift-6 -print-implicit-attrs -module-to-print=VirtualMethods -I %S/Inputs -source-filename=x | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -cxx-interoperability-mode=upcoming-swift -print-implicit-attrs -module-to-print=VirtualMethods -I %S/Inputs -source-filename=x | %FileCheck %s
 
 // CHECK: struct Base {

test/Interop/Cxx/class/move-only/inherited-field-access-irgen.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-emit-irgen -I %S/Inputs -cxx-interoperability-mode=swift-6 %s -validate-tbd-against-ir=none -Xcc -fignore-exceptions | %FileCheck %s
 // RUN: %target-swift-emit-irgen -I %S/Inputs -cxx-interoperability-mode=upcoming-swift %s -validate-tbd-against-ir=none -Xcc -fignore-exceptions | %FileCheck %s
 
 import MoveOnlyCxxValueType

test/Interop/Cxx/class/move-only/inherited-field-access-silgen.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-emit-sil -I %S/Inputs -cxx-interoperability-mode=swift-6 %s -validate-tbd-against-ir=none | %FileCheck %s
 // RUN: %target-swift-emit-sil -I %S/Inputs -cxx-interoperability-mode=upcoming-swift %s -validate-tbd-against-ir=none | %FileCheck %s
 
 import MoveOnlyCxxValueType

test/Interop/Cxx/class/type-classification-module-interface.swift

@@ -1,4 +1,6 @@
+// RUN: %target-swift-ide-test -print-module -module-to-print=TypeClassification -I %S/Inputs -source-filename=x -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=TypeClassification -I %S/Inputs -source-filename=x -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -skip-unsafe-cxx-methods -module-to-print=TypeClassification -I %S/Inputs -source-filename=x -cxx-interoperability-mode=swift-6 | %FileCheck %s -check-prefix=CHECK-SKIP-UNSAFE
 // RUN: %target-swift-ide-test -print-module -skip-unsafe-cxx-methods -module-to-print=TypeClassification -I %S/Inputs -source-filename=x -cxx-interoperability-mode=upcoming-swift | %FileCheck %s -check-prefix=CHECK-SKIP-UNSAFE
 
 // Make sure we don't import objects that we can't copy or destroy.

test/Interop/Cxx/class/type-classification-typechecker.swift

@@ -1,3 +1,4 @@
+// RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=swift-6
 // RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=upcoming-swift
 
 import TypeClassification

test/Interop/Cxx/ergonomics/swift-bridging-annotations.swift

@@ -8,6 +8,7 @@
 
 // RUN: %target-swift-ide-test -print-module -module-to-print=SwiftMod -module-to-print=CxxModule -I %t -I %t/Inputs -I %swift_src_root/lib/ClangImporter -source-filename=x -enable-experimental-cxx-interop -Xcc -DINCMOD | %FileCheck %s
 
+// RUN: %target-swift-ide-test -print-module -module-to-print=SwiftMod -module-to-print=CxxModule -I %t -I %t/Inputs -I %swift_src_root/lib/ClangImporter -source-filename=x -cxx-interoperability-mode=swift-6 -Xcc -DINCMOD | %FileCheck --check-prefixes=CHECK,CHECKLATEST %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=SwiftMod -module-to-print=CxxModule -I %t -I %t/Inputs -I %swift_src_root/lib/ClangImporter -source-filename=x -cxx-interoperability-mode=upcoming-swift -Xcc -DINCMOD | %FileCheck --check-prefixes=CHECK,CHECKLATEST %s
 
 // Test through the use of the bridging header

test/Interop/Cxx/function/default-arguments-irgen.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-emit-irgen -I %S/Inputs -cxx-interoperability-mode=swift-6 %s | %FileCheck %s
 // RUN: %target-swift-emit-irgen -I %S/Inputs -cxx-interoperability-mode=upcoming-swift %s | %FileCheck %s
 
 import DefaultArguments

test/Interop/Cxx/function/default-arguments-module-interface.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-ide-test -print-module -module-to-print=DefaultArguments -I %S/Inputs -source-filename=x -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=DefaultArguments -I %S/Inputs -source-filename=x -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
 
 // CHECK: func isZero(_ value: Int32 = cxxDefaultArg) -> Bool

test/Interop/Cxx/function/default-arguments-typechecker.swift

@@ -1,3 +1,4 @@
+// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -cxx-interoperability-mode=swift-6
 // RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %S/Inputs -cxx-interoperability-mode=upcoming-swift
 
 import DefaultArguments

test/Interop/Cxx/operators/member-inline-module-interface.swift

@@ -1,3 +1,4 @@
+// RUN: %target-swift-ide-test -print-module -module-to-print=MemberInline -I %S/Inputs -source-filename=x -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=MemberInline -I %S/Inputs -source-filename=x -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
 
 // CHECK: struct LoadableIntWrapper {

test/Interop/Cxx/operators/member-inline-typechecker.swift

@@ -1,3 +1,4 @@
+// RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=swift-6
 // RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=upcoming-swift
 
 import MemberInline

test/Interop/Cxx/operators/member-inline.swift

@@ -1,3 +1,4 @@
+// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -cxx-interoperability-mode=upcoming-swift)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/operators/move-only/move-only-synthesized-properties.swift

@@ -1,4 +1,6 @@
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift)
+// RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=swift-6 -O)
 // RUN: %target-run-simple-swift(-I %S/Inputs/ -cxx-interoperability-mode=upcoming-swift -O)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/operators/move-only/move-only-synthesized-property-typecheck.swift

@@ -1,7 +1,9 @@
+// RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=swift-6 -DNO_CONSUME
 // RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -DNO_CONSUME
 
 // Note: some errors need full SIL emission right now.
 // FIXME: they should be type checker errors.
+// RUN: not %target-swift-emit-sil %s -I %S/Inputs -cxx-interoperability-mode=swift-6 2>&1 | %FileCheck %s
 // RUN: not %target-swift-emit-sil %s -I %S/Inputs -cxx-interoperability-mode=upcoming-swift 2>&1 | %FileCheck %s
 
 import MoveOnlyCxxOperators

test/Interop/Cxx/stdlib/avoid-import-cxx-math.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-frontend %s -typecheck -verify -enable-experimental-cxx-interop -Xcc -std=c++17
+// RUN: %target-swift-frontend %s -typecheck -verify -cxx-interoperability-mode=swift-6 -Xcc -std=c++17
 // RUN: %target-swift-frontend %s -typecheck -verify -cxx-interoperability-mode=upcoming-swift -Xcc -std=c++17
 
 // REQUIRES: OS=macosx || OS=linux-gnu

test/Interop/Cxx/stdlib/import-cxx-math-ambiguities.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-frontend %s -typecheck -enable-experimental-cxx-interop -Xcc -std=c++17
+// RUN: %target-swift-frontend %s -typecheck -cxx-interoperability-mode=swift-6 -Xcc -std=c++17
 // RUN: %target-swift-frontend %s -typecheck -cxx-interoperability-mode=upcoming-swift -Xcc -std=c++17
 
 #if canImport(Foundation)

test/Interop/Cxx/stdlib/overlay/convertible-to-bool-module-interface.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-ide-test -print-module -module-to-print=ConvertibleToBool -source-filename=x -I %S/Inputs -enable-experimental-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=ConvertibleToBool -source-filename=x -I %S/Inputs -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=ConvertibleToBool -source-filename=x -I %S/Inputs -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
 
 // CHECK: struct BoolBox : CxxConvertibleToBool {

test/Interop/Cxx/stdlib/overlay/convertible-to-bool-typechecker.swift

@@ -1,4 +1,5 @@
 // RUN: %target-typecheck-verify-swift -I %S/Inputs -enable-experimental-cxx-interop
+// RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=swift-6
 // RUN: %target-typecheck-verify-swift -I %S/Inputs -cxx-interoperability-mode=upcoming-swift
 
 import ConvertibleToBool

test/Interop/Cxx/stdlib/overlay/convertible-to-bool.swift

@@ -1,4 +1,5 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/overlay/custom-collection-module-interface.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-ide-test -print-module -module-to-print=CustomSequence -source-filename=x -I %S/Inputs -enable-experimental-cxx-interop -module-cache-path %t | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=CustomSequence -source-filename=x -I %S/Inputs -cxx-interoperability-mode=swift-6 -module-cache-path %t | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=CustomSequence -source-filename=x -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -module-cache-path %t | %FileCheck %s
 
 // CHECK: struct SimpleArrayWrapper : CxxRandomAccessCollection {

test/Interop/Cxx/stdlib/overlay/custom-collection.swift

@@ -1,4 +1,5 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/overlay/custom-convertible-to-collection.swift

@@ -1,4 +1,5 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/overlay/custom-iterator-module-interface.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-ide-test -print-module -module-to-print=CustomIterator -source-filename=x -I %S/Inputs -enable-experimental-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=CustomIterator -source-filename=x -I %S/Inputs -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=CustomIterator -source-filename=x -I %S/Inputs -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
 
 // CHECK: struct ConstIterator : UnsafeCxxInputIterator {

test/Interop/Cxx/stdlib/overlay/custom-sequence-module-interface.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-ide-test -print-module -module-to-print=CustomSequence -source-filename=x -I %S/Inputs -enable-experimental-cxx-interop -module-cache-path %t | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=CustomSequence -source-filename=x -I %S/Inputs -cxx-interoperability-mode=swift-6 -module-cache-path %t | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=CustomSequence -source-filename=x -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -module-cache-path %t | %FileCheck %s
 
 // CHECK: struct SimpleSequence : CxxConvertibleToCollection {

test/Interop/Cxx/stdlib/use-std-function.swift

@@ -1,4 +1,5 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-map.swift

@@ -1,10 +1,12 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 
 // Also test this with a bridging header instead of the StdMap module.
 // RUN: %empty-directory(%t2)
 // RUN: cp %S/Inputs/std-map.h %t2/std-map-bridging-header.h
 // RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-map-bridging-header.h -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-map-bridging-header.h -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-map-bridging-header.h -cxx-interoperability-mode=upcoming-swift)
 
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-optional.swift

@@ -1,3 +1,4 @@
+// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -cxx-interoperability-mode=swift-6 -Xcc -std=c++17)
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -cxx-interoperability-mode=upcoming-swift -Xcc -std=c++17)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-pair.swift

@@ -1,4 +1,5 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-set.swift

@@ -1,10 +1,12 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 
 // Also test this with a bridging header instead of the StdSet module.
 // RUN: %empty-directory(%t2)
 // RUN: cp %S/Inputs/std-set.h %t2/std-set-bridging-header.h
 // RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-set-bridging-header.h -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-set-bridging-header.h -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-set-bridging-header.h -cxx-interoperability-mode=upcoming-swift)
 
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-string.swift

@@ -1,5 +1,6 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop -D USE_CUSTOM_STRING_API)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6 -D SUPPORTS_DEFAULT_ARGUMENTS -D USE_CUSTOM_STRING_API)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift -D SUPPORTS_DEFAULT_ARGUMENTS -D USE_CUSTOM_STRING_API)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-unique-ptr.swift

@@ -1,3 +1,4 @@
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 //
 // REQUIRES: executable_test

test/Interop/Cxx/stdlib/use-std-vector.swift

@@ -1,10 +1,12 @@
 // RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
 
 // Also test this with a bridging header instead of the StdVector module.
 // RUN: %empty-directory(%t2)
 // RUN: cp %S/Inputs/std-vector.h %t2/std-vector-bridging-header.h
 // RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-vector-bridging-header.h -Xfrontend -enable-experimental-cxx-interop)
+// RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-vector-bridging-header.h -cxx-interoperability-mode=swift-6)
 // RUN: %target-run-simple-swift(-D BRIDGING_HEADER -import-objc-header %t2/std-vector-bridging-header.h -cxx-interoperability-mode=upcoming-swift)
 
 // FIXME: also run in C++20 mode when conformance works properly on UBI platform (rdar://109366764):

test/Interop/Cxx/templates/class-template-with-function-parameter-module-interface.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-ide-test -print-module -module-to-print=ClassTemplateWithFunctionParameter -I %S/Inputs -source-filename=x -enable-experimental-cxx-interop | %FileCheck %s
+// RUN: %target-swift-ide-test -print-module -module-to-print=ClassTemplateWithFunctionParameter -I %S/Inputs -source-filename=x -cxx-interoperability-mode=swift-6 | %FileCheck %s
 // RUN: %target-swift-ide-test -print-module -module-to-print=ClassTemplateWithFunctionParameter -I %S/Inputs -source-filename=x -cxx-interoperability-mode=upcoming-swift | %FileCheck %s
 
 // CHECK: @available(*, unavailable

tools/swift-ide-test/swift-ide-test.cpp

@@ -4400,6 +4400,12 @@ int main(int argc, char *argv[]) {
     if (options::CxxInteropVersion == "upcoming-swift")
       InitInvok.getLangOptions().cxxInteropCompatVersion =
           version::Version({version::getUpcomingCxxInteropCompatVersion()});
+    else if (options::CxxInteropVersion == "swift-6")
+      InitInvok.getLangOptions().cxxInteropCompatVersion =
+          version::Version({6});
+    else if (options::CxxInteropVersion == "swift-5.9")
+      InitInvok.getLangOptions().cxxInteropCompatVersion =
+          version::Version({5, 9});
     else
       llvm::errs() << "invalid CxxInteropVersion\n";
   }