[concurrency] Remove from test RUN lines uses of enable-upcoming-feature RegionBasedIsolation when it is already inferred from strict-concurrency=complete.

test/CAS/cached_diagnostics_empty_filename.swift

@@ -1,4 +1,3 @@
-// REQUIRES: swift_feature_RegionBasedIsolation
 // REQUIRES: objc_interop
 
 // RUN: %empty-directory(%t)
@@ -36,7 +35,7 @@
 // RUN: echo "\"@%t/map.casid\"" >> %t/MyApp.cmd
 
 // RUN: %target-swift-frontend  -cache-compile-job -module-name Test -O -cas-path %t/cas @%t/MyApp.cmd %t/test.swift \
-// RUN:   -emit-module -o %t/test.swiftmodule -require-explicit-sendable -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
+// RUN:   -emit-module -o %t/test.swiftmodule -require-explicit-sendable -strict-concurrency=complete
 
 //--- module.modulemap
 module A {

test/Concurrency/CaseIterableIsolation.swift

@@ -1,9 +1,7 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 import StdlibUnittest
 

test/Concurrency/actor_defer.swift

@@ -1,12 +1,10 @@
 // RUN: %target-swift-frontend -parse-as-library -emit-sil -DNEGATIVES -verify %s
 // RUN: %target-swift-frontend -parse-as-library -emit-sil -DNEGATIVES -verify %s -strict-concurrency=targeted
 // RUN: %target-swift-frontend -parse-as-library -emit-sil -DNEGATIVES -verify %s -strict-concurrency=complete
-// RUN: %target-swift-frontend -parse-as-library -emit-sil -DNEGATIVES -verify %s -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // RUN: %target-swift-frontend -parse-as-library -emit-sil -enable-actor-data-race-checks -o - %s | %FileCheck %s
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 func doSomething() {}
 

test/Concurrency/actor_derived_conformances.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 actor A1: Comparable {}
 // expected-error@-1 {{type 'A1' does not conform to protocol 'Comparable'}}

test/Concurrency/actor_existentials.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 protocol P: Actor {
   func f()

test/Concurrency/actor_isolation_cycle.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 public protocol P {
   associatedtype T

test/Concurrency/actor_isolation_objc.swift

@@ -1,11 +1,9 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
 // REQUIRES: objc_interop
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 import Foundation
 

test/Concurrency/actor_isolation_unsafe.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -verify-additional-prefix complete-tns- -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -verify-additional-prefix complete-tns- -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 @globalActor
 actor SomeGlobalActor {

test/Concurrency/actor_keypath_isolation.swift

@@ -1,8 +1,6 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -strict-concurrency=complete %s -emit-sil -o /dev/null -verify
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -strict-concurrency=complete %s -emit-sil -o /dev/null -verify -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 class Box {
     let size : Int = 0

test/Concurrency/actor_withCancellationHandler.swift

@@ -2,10 +2,8 @@
 // RUN: %target-swift-frontend -emit-module -emit-module-path %t/OtherActors.swiftmodule -module-name OtherActors %S/Inputs/OtherActors.swift -target %target-swift-5.1-abi-triple
 
 // RUN: %target-swift-frontend -I %t  -target %target-swift-5.1-abi-triple -strict-concurrency=complete -parse-as-library %s -emit-sil -o /dev/null -verify
-// RUN: %target-swift-frontend -I %t  -target %target-swift-5.1-abi-triple -strict-concurrency=complete -parse-as-library %s -emit-sil -o /dev/null -verify -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 actor Foo {
   var t: Task<Void, Error>?

test/Concurrency/async_computed_property.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 func asyncFunc(_ value: String) async {}
 

test/Concurrency/async_conformance.swift

@@ -1,11 +1,9 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify %s
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=targeted %s
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=complete %s
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation %s
 
 // REQUIRES: objc_interop
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 import Foundation
 

test/Concurrency/async_initializer.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -enable-experimental-concurrency -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify %s
 // RUN: %target-swift-frontend -enable-experimental-concurrency -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=targeted %s
 // RUN: %target-swift-frontend -enable-experimental-concurrency -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=complete %s -verify-additional-prefix complete-and-tns-
-// RUN: %target-swift-frontend -enable-experimental-concurrency -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation %s -verify-additional-prefix complete-and-tns-
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 ////
 // some functions to play with

test/Concurrency/async_initializer_objc.swift

@@ -1,11 +1,9 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
 // REQUIRES: objc_interop
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 import Foundation
 

test/Concurrency/async_let_capture.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple  %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple  %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple  %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple  %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 func autoclosureCapture(_: @autoclosure () async throws -> Int) async {}
 func nonescapingCapture(_: () async throws -> Int) {}

test/Concurrency/async_main_invalid_global_actor.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 @globalActor
 actor Kat {

test/Concurrency/async_main_mainactor_isolation.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 // This should pass without any warnings or errors
 

test/Concurrency/async_task_groups_and_actors.swift

@@ -1,8 +1,7 @@
-// RUN: %target-swift-frontend  -disable-availability-checking %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
+// RUN: %target-swift-frontend  -disable-availability-checking %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
 
 // REQUIRES: concurrency
 // REQUIRES: libdispatch
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 @MainActor
 class MyActor {

test/Concurrency/async_task_groups_as_sequence.swift

@@ -1,11 +1,9 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
 // REQUIRES: libdispatch
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 @available(SwiftStdlib 5.1, *)
 @rethrows

test/Concurrency/async_task_locals_basic_warnings.swift

@@ -2,11 +2,9 @@
 // RUN: %target-swift-frontend -plugin-path %swift-plugin-dir -emit-module -emit-module-path %t/OtherActors.swiftmodule -module-name OtherActors %S/Inputs/OtherActors.swift -target %target-swift-5.1-abi-triple
 
 // RUN: %target-swift-frontend -I %t -plugin-path %swift-plugin-dir -target %target-swift-5.1-abi-triple -strict-concurrency=complete -parse-as-library %s -emit-sil -o /dev/null -verify
-// RUN: %target-swift-frontend -I %t -plugin-path %swift-plugin-dir -target %target-swift-5.1-abi-triple -strict-concurrency=complete -parse-as-library %s -emit-sil -o /dev/null -verify -enable-upcoming-feature RegionBasedIsolation
 // RUN: %target-swift-frontend -I %t -plugin-path %swift-plugin-dir -disable-availability-checking -swift-version 6 -parse-as-library %s -emit-sil -o /dev/null -verify
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 actor Test {
 

test/Concurrency/async_throwing.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 // These tests cover various interactions with async functions that are
 // either throws or rethrows.

test/Concurrency/attr_discardableResult_async_await.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 // https://github.com/apple/swift/issues/60276
 

test/Concurrency/concurrency_module_shadowing.swift

@@ -5,10 +5,8 @@
 // RUN: %target-swift-frontend -I %t  -disable-availability-checking %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -I %t  -disable-availability-checking %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -I %t  -disable-availability-checking %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -I %t  -disable-availability-checking %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 import ShadowsConcur
 

test/Concurrency/concurrent_value_inference.swift

@@ -1,8 +1,6 @@
 // RUN: %target-swift-frontend -enable-library-evolution -strict-concurrency=complete %s -emit-sil -o /dev/null -verify
-// RUN: %target-swift-frontend -enable-library-evolution -strict-concurrency=complete %s -emit-sil -o /dev/null -verify -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 class C1 { } // expected-note {{class 'C1' does not conform to the 'Sendable' protocol}}
 final class C2: Sendable { }

test/Concurrency/concurrentfunction_capturediagnostics.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -enable-experimental-flow-sensitive-concurrent-captures -verify -emit-sil %s -o - >/dev/null
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -enable-experimental-flow-sensitive-concurrent-captures -verify -emit-sil %s -o - >/dev/null -strict-concurrency=targeted
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -enable-experimental-flow-sensitive-concurrent-captures -verify -emit-sil %s -o - >/dev/null -strict-concurrency=complete
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -enable-experimental-flow-sensitive-concurrent-captures -verify -emit-sil %s -o - >/dev/null -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 func f(_: @escaping @Sendable () -> Void) { }
 open class F {

test/Concurrency/custom_executor_enqueue_availability.swift

@@ -1,11 +1,9 @@
 // RUN: %target-swift-frontend -enable-experimental-move-only %s -emit-sil -o /dev/null -verify
 // RUN: %target-swift-frontend -enable-experimental-move-only %s -emit-sil -o /dev/null -verify -strict-concurrency=targeted
 // RUN: %target-swift-frontend -enable-experimental-move-only %s -emit-sil -o /dev/null -verify -strict-concurrency=complete
-// RUN: %target-swift-frontend -enable-experimental-move-only %s -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation
 
 // REQUIRES: concurrency
 // REQUIRES: OS=macosx
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 // rdar://106849189 move-only types should be supported in freestanding mode
 // UNSUPPORTED: freestanding

test/Concurrency/custom_executor_enqueue_deprecation_on_executor_extension.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify %s
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=targeted %s
 // RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=complete %s
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation %s
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 // rdar://106849189 move-only types should be supported in freestanding mode
 // UNSUPPORTED: freestanding

test/Concurrency/custom_executor_enqueue_impls.swift

@@ -1,10 +1,8 @@
 // RUN: %target-swift-frontend -disable-availability-checking -emit-sil -o /dev/null -verify %s
 // RUN: %target-swift-frontend -disable-availability-checking -emit-sil -o /dev/null -verify -strict-concurrency=targeted %s
 // RUN: %target-swift-frontend -disable-availability-checking -emit-sil -o /dev/null -verify -strict-concurrency=complete %s
-// RUN: %target-swift-frontend -disable-availability-checking -emit-sil -o /dev/null -verify -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation %s
 
 // REQUIRES: concurrency
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 // rdar://106849189 move-only types should be supported in freestanding mode
 // UNSUPPORTED: freestanding

test/Concurrency/default_actor_definit.swift

@@ -1,11 +1,9 @@
 // RUN: %target-swift-frontend -Xllvm -sil-print-types -emit-sil %s  -target %target-swift-5.1-abi-triple | %FileCheck %s
 // RUN: %target-swift-frontend -Xllvm -sil-print-types -emit-sil %s  -target %target-swift-5.1-abi-triple -strict-concurrency=targeted | %FileCheck %s
 // RUN: %target-swift-frontend -Xllvm -sil-print-types -emit-sil %s  -target %target-swift-5.1-abi-triple -strict-concurrency=complete | %FileCheck %s
-// RUN: %target-swift-frontend -Xllvm -sil-print-types -emit-sil %s  -target %target-swift-5.1-abi-triple -strict-concurrency=complete -enable-upcoming-feature RegionBasedIsolation | %FileCheck %s
 
 // REQUIRES: concurrency
 // REQUIRES: swift_in_compiler
-// REQUIRES: swift_feature_RegionBasedIsolation
 
 actor A {
   var x: String = "Hello"