[silgen] Change two places we used Builtin.Executor to instead use Optional<any Actor> as an expected executor.

We want SILGen to have a simplified view of its executor and know that whenever one sees an Actor, it is an actual actor instead of a Builtin.Executor. This just simplifies code. Also, we should eventually have an invariant that Builtin.Executor should only be allowed in LoweredSIL after LowerHopToExecutor has run. But that is a change for another day.
2025-12-14 20:36:38 +01:00 · 2025-08-08 13:50:02 -07:00
parent 2fa3908e94
commit 81885a67d0
21 changed files with 155 additions and 149 deletions
--- a/lib/SILGen/SILGenConcurrency.cpp
+++ b/lib/SILGen/SILGenConcurrency.cpp
@@ -27,7 +27,7 @@ using namespace Lowering;

 static void setExpectedExecutorForGeneric(SILGenFunction &SGF) {
  auto loc = RegularLocation::getAutoGeneratedLocation(SGF.F.getLocation());
-  SGF.ExpectedExecutor.set(SGF.emitGenericExecutor(loc));
+  SGF.ExpectedExecutor.set(SGF.emitNonIsolatedIsolation(loc).getValue());
 }

 static void setExpectedExecutorForGlobalActor(SILGenFunction &SGF,
@@ -284,8 +284,9 @@ void SILGenFunction::emitConstructorExpectedExecutorProlog() {
      loc.markAsPrologue();
      loc = loc.asAutoGenerated();

-      auto initialExecutor = emitGenericExecutor(loc);
-      B.createHopToExecutor(loc, initialExecutor, /*mandatory*/ false);
+      auto initialExecutor = emitNonIsolatedIsolation(loc);
+      B.createHopToExecutor(loc, initialExecutor.getValue(),
+                            /*mandatory*/ false);
      return;
    }
  }
--- a/test/Concurrency/attr_execution/conversions_silgen.swift
+++ b/test/Concurrency/attr_execution/conversions_silgen.swift
@@ -152,6 +152,8 @@ public func testCallerToCaller(_ x: nonisolated(nonsending) @escaping () async -

 // CHECK-LABEL: sil [ossa] @$s21attr_execution_silgen24testCallerLocalVariablesyyyyYaYCcYaF : $@convention(thin) @async (@guaranteed @async @callee_guaranteed (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>) -> ()) -> () {
 // CHECK: bb0([[PARAM:%.*]] : @guaranteed $@async @callee_guaranteed (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>) -> ()):
+// CHECK:   [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
+// CHECK:   hop_to_executor [[ACTOR]]
 // CHECK:   [[PARAM_COPY:%.*]] = copy_value [[PARAM]]
 // CHECK:   [[Y:%.*]] = move_value [lexical] [var_decl] [[PARAM_COPY]]
 // CHECK:   [[Y_B:%.*]] = begin_borrow [[Y]]
@@ -159,7 +161,6 @@ public func testCallerToCaller(_ x: nonisolated(nonsending) @escaping () async -
 // CHECK:   [[Y2:%.*]] = move_value [lexical] [var_decl] [[Y_B_C]]
 // CHECK:   [[Y2_B:%.*]] = begin_borrow [[Y2]]
 // CHECK:   [[Y2_B_C:%.*]] = copy_value [[Y2_B]]
-// CHECK:   [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
 // CHECK:   [[Y2_B_C_B:%.*]] = begin_borrow [[Y2_B_C]]
 // CHECK:   apply [[Y2_B_C_B]]([[ACTOR]])
 // CHECK: } // end sil function '$s21attr_execution_silgen24testCallerLocalVariablesyyyyYaYCcYaF'
@@ -522,7 +523,7 @@ func testThatClosuresAssumeIsolation(fn: inout nonisolated(nonsending) (Int) asy
  testParam { 42 }

  // CHECK-LABEL: sil private [ossa] @$s21attr_execution_silgen31testThatClosuresAssumeIsolation2fnyySiYaYCcz_tFyyYaXEfU1_ : $@convention(thin) @async () -> ()
-  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
  // CHECK: hop_to_executor [[GENERIC_EXECUTOR]]
  testParam { @concurrent in 42 }

@@ -538,7 +539,7 @@ func testThatClosuresAssumeIsolation(fn: inout nonisolated(nonsending) (Int) asy
  fn = { _ in }

  // CHECK-LABEL: sil private [ossa] @$s21attr_execution_silgen31testThatClosuresAssumeIsolation2fnyySiYaYCcz_tFySiYacfU3_ : $@convention(thin) @async (Int) -> ()
-  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
  // CHECK: hop_to_executor [[GENERIC_EXECUTOR]]
  // CHECK: } // end sil function '$s21attr_execution_silgen31testThatClosuresAssumeIsolation2fnyySiYaYCcz_tFySiYacfU3_'

@@ -557,7 +558,7 @@ func testNoIsolationTransfer() {
  func testErasure(@_inheritActorContext _: @escaping @isolated(any) () async -> Void) {}

  // CHECK-LABEL: sil private [ossa] @$s21attr_execution_silgen23testNoIsolationTransferyyFyyYacfU_ : $@convention(thin) @async (@guaranteed Optional<any Actor>) -> ()
-  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
  // CHECK: hop_to_executor [[GENERIC_EXECUTOR]]
  testErasure { @concurrent in }
 }
@@ -566,7 +567,7 @@ func testClosuresDontAssumeGlobalActorWithMarkedAsConcurrent() {
  func test(_ fn: @MainActor () async -> Void) {}

  // CHECK-LABEL: sil private [ossa] @$s21attr_execution_silgen55testClosuresDontAssumeGlobalActorWithMarkedAsConcurrentyyFyyYaYbXEfU_
-  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+  // CHECK: [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
  // CHECK-NEXT: hop_to_executor [[GENERIC_EXECUTOR]]
  // CHECK: } // end sil function '$s21attr_execution_silgen55testClosuresDontAssumeGlobalActorWithMarkedAsConcurrentyyFyyYaYbXEfU_'
  test { @Sendable @concurrent in
--- a/test/Concurrency/attr_execution/witnesses.swift
+++ b/test/Concurrency/attr_execution/witnesses.swift
@@ -41,15 +41,13 @@ func testMainActorDispatch<T: P>(t: T) async {
 }

 // CHECK-LABEL: sil hidden [ossa] @$s9witnesses19testGenericExecutor1tyx_tYaAA1PRzlF : $@convention(thin) @async <T where T : P> (@in_guaranteed T) -> ()
-// CHECK: [[CONTEXT_ISOLATION:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+// CHECK: [[CONTEXT_ISOLATION:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
 // CHECK-NEXT: hop_to_executor [[CONTEXT_ISOLATION]]
-// CHECK-NEXT: [[ISOLATION_ERASED_TO_ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
 // CHECK-NEXT: [[PROP_WITNESS:%.*]] = witness_method $T, #P.prop!getter : <Self where Self : P> (Self) -> () async -> String : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> @owned String
-// CHECK-NEXT: {{.*}} = apply [[PROP_WITNESS]]<T>([[ISOLATION_ERASED_TO_ACTOR]], %0) : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> @owned String
+// CHECK-NEXT: {{.*}} = apply [[PROP_WITNESS]]<T>([[CONTEXT_ISOLATION]], %0) : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> @owned String
 // CHECK-NEXT: hop_to_executor [[CONTEXT_ISOLATION]]
-// CHECK: [[ISOLATION_ERASED_TO_ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
-// CHECK-NEXT: [[FN_WITNESS:%.*]] = witness_method $T, #P.fn : <Self where Self : P> (Self) -> () async -> () : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> ()
-// CHECK-NEXT: {{.*}} = apply [[FN_WITNESS]]<T>([[ISOLATION_ERASED_TO_ACTOR]], %0) : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> ()
+// CHECK: [[FN_WITNESS:%.*]] = witness_method $T, #P.fn : <Self where Self : P> (Self) -> () async -> () : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> ()
+// CHECK-NEXT: {{.*}} = apply [[FN_WITNESS]]<T>([[CONTEXT_ISOLATION]], %0) : $@convention(witness_method: P) @async <τ_0_0 where τ_0_0 : P> (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @in_guaranteed τ_0_0) -> ()
 // CHECK: } // end sil function '$s9witnesses19testGenericExecutor1tyx_tYaAA1PRzlF'
 func testGenericExecutor<T: P>(t: T) async {
  _ = await t.prop
--- a/test/Concurrency/cross_module_let_sil.swift
+++ b/test/Concurrency/cross_module_let_sil.swift
@@ -7,12 +7,12 @@ import OtherActors

 // CHECK-LABEL: sil hidden [ossa] @$s4test6check1ySi11OtherActors0C11ModuleActorCYaF : $@convention(thin) @async (@guaranteed OtherModuleActor) -> Int {
 // CHECK:     bb0([[SELF:%[0-9]+]] : @guaranteed $OtherModuleActor):
-// CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // CHECK:       [[REF:%[0-9]+]] = ref_element_addr [[SELF]] : $OtherModuleActor, #OtherModuleActor.a
 // CHECK:       hop_to_executor [[SELF]] : $OtherModuleActor
 // CHECK-NEXT:  load [trivial] [[REF]]
-// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]]
 // CHECK: } // end sil function '$s4test6check1ySi11OtherActors0C11ModuleActorCYaF'
 func check1(_ actor: OtherModuleActor) async -> Int {
  return await actor.a
@@ -24,23 +24,23 @@ func check2(_ actor: isolated OtherModuleActor) -> Int {

 // CHECK-LABEL: sil hidden [ossa] @$s4test6check3ySi11OtherActors0C11ModuleActorCYaF : $@convention(thin) @async (@guaranteed OtherModuleActor) -> Int {
 // CHECK:     bb0([[SELF:%[0-9]+]] : @guaranteed $OtherModuleActor):
-// CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]]
 func check3(_ actor: OtherModuleActor) async -> Int {
  return actor.b
 }

 // CHECK-LABEL: sil hidden [ossa] @$s4test6check4y11OtherActors17SomeSendableClassCSgAC0C11ModuleActorCSgYaF : $@convention(thin) @async (@guaranteed Optional<OtherModuleActor>) -> @owned Optional<SomeSendableClass> {
 // CHECK:  bb0({{%[0-9]+}} : @guaranteed $Optional<OtherModuleActor>):
-// CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// CHECK-NEXT:  hop_to_executor [[GENERIC_EXEC]]
 // CHECK:       switch_enum {{%[0-9]+}} : $Optional<OtherModuleActor>, case #Optional.some!enumelt: [[SOME:bb[0-9]+]], case #Optional.none!enumelt: {{bb[0-9]+}}

 // CHECK:  [[SOME]]({{%[0-9]+}} : @owned $OtherModuleActor):
 // CHECK:       [[REF:%[0-9]+]] = ref_element_addr {{%[0-9]+}} : $OtherModuleActor, #OtherModuleActor.d
 // CHECK:       hop_to_executor {{%[0-9]+}} : $OtherModuleActor
 // CHECK-NEXT:  load [copy] [[REF]]
-// CHECK:       hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK:       hop_to_executor [[GENERIC_EXEC]]
 // CHECK: } // end sil function '$s4test6check4y11OtherActors17SomeSendableClassCSgAC0C11ModuleActorCSgYaF'
 func check4(_ actor: OtherModuleActor?) async -> SomeSendableClass? {
  return await actor?.d
--- a/test/Concurrency/isolated_default_argument_eval.swift
+++ b/test/Concurrency/isolated_default_argument_eval.swift
@@ -27,11 +27,11 @@ func mainActorMultiDefaultArg(x: Int = requiresMainActor(),

 // CHECK-LABEL: sil hidden [ossa] @$s30isolated_default_argument_eval22nonisolatedAsyncCalleryyYaF
 func nonisolatedAsyncCaller() async {
-  // CHECK: hop_to_executor {{.*}} : $Optional<Builtin.Executor>
+  // CHECK: hop_to_executor {{.*}}
  // CHECK: hop_to_executor {{.*}} : $MainActor
  // CHECK: [[GET_VALUE:%[0-9]+]] = function_ref @$s30isolated_default_argument_eval19mainActorDefaultArg5valueS2i_tFfA_
  // CHECK-NEXT: apply [[GET_VALUE]]()
-  // CHECK: hop_to_executor {{.*}} : $Optional<Builtin.Executor>
+  // CHECK: hop_to_executor {{.*}}
  await mainActorDefaultArg()

  // CHECK: hop_to_executor {{.*}} : $MainActor
@@ -46,7 +46,7 @@ func nonisolatedAsyncCaller() async {
  // CHECK-NOT: hop_to_executor
  // CHECK: [[GET_Z:%[0-9]+]] = function_ref @$s30isolated_default_argument_eval24mainActorMultiDefaultArg1x1y5tuple1zySi_S2i_SitSitFfA2_
  // CHECK-NEXT: apply [[GET_Z]]()
-  // CHECK: hop_to_executor {{.*}} : $Optional<Builtin.Executor>
+  // CHECK: hop_to_executor {{.*}}
  await mainActorMultiDefaultArg()
 }

@@ -57,7 +57,7 @@ var argValue: Int { 0 }

 // CHECK-LABEL: sil hidden [ossa] @$s30isolated_default_argument_eval20passInoutWithDefaultyyYaF
 func passInoutWithDefault() async {
-  // CHECK: hop_to_executor {{.*}} : $Optional<Builtin.Executor>
+  // CHECK: hop_to_executor {{.*}}

  var x = 0

@@ -69,7 +69,7 @@ func passInoutWithDefault() async {
  // CHECK-NEXT: [[Z:%[0-9]+]] = apply [[GET_Z]]()
  // CHECK: [[FN:%[0-9]+]] = function_ref @$s30isolated_default_argument_eval0A15DefaultInoutMix1x1y1zySiz_S2itF : $@convention(thin) (@inout Int, Int, Int) -> ()
  // CHECK: apply [[FN]]([[INOUT_X]], [[ARG_VALUE]], [[Z]])
-  // CHECK: hop_to_executor {{.*}} : $Optional<Builtin.Executor>
+  // CHECK: hop_to_executor {{.*}}
  await isolatedDefaultInoutMix(x: &x, y: argValue)
 }

--- a/test/IRGen/typed_throws_abi.swift
+++ b/test/IRGen/typed_throws_abi.swift
@@ -3107,7 +3107,7 @@ func callNonMatching_f1(_ b: Bool) -> (Int, Float, Bool, Float) {
 // CHECK: [[SUCCESS]]:
 // CHECK:   call i1 (ptr, i1, ...) @llvm.coro.end.async(ptr {{%.*}}, i1 false, ptr @"$s16typed_throws_abi20nonMatching_f0_asyncySf_SftSbYaAA7OneWordVYKF{{.*}}", ptr {{%.*}}, ptr {{%.*}}, float 1.000000e+00, float 2.000000e+00, i64 undef, ptr null)
 // CHECK:   unreachable
-// CHECK: 18:
+// CHECK: [[ERROR]]:
 // CHECK:   [[ERROR_X:%.*]] = call swiftcc i64 @"$s16typed_throws_abi7OneWordVACycfC"()
 // CHECK:   [[ERROR_RET:%.*]] = insertvalue { float, float, i64 } undef, i64 [[ERROR_X]], 2
 // CHECK:   [[ERROR_RET0:%.*]] = extractvalue { float, float, i64 } [[ERROR_RET]], 0
--- a/test/SILGen/async_builtins.swift
+++ b/test/SILGen/async_builtins.swift
@@ -2,6 +2,7 @@
 // REQUIRES: concurrency

 import Swift
+import _Concurrency

 public struct X {
  // CHECK-LABEL: sil hidden [ossa] @$s4test1XV14getCurrentTaskBoyYaF
--- a/test/SILGen/async_initializer.swift
+++ b/test/SILGen/async_initializer.swift
@@ -64,7 +64,7 @@ actor MyActor {
  // CHECK-DAG:   sil hidden [ossa] @$s12initializers7MyActorCACyYacfc : $@convention(method) @async (@sil_isolated @owned MyActor) -> @owned MyActor
  // CHECK:       bb0(%0 : @owned $MyActor):
  //   In the prologue, hop to the generic executor.
-  // CHECK-NEXT:       [[NIL_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK-NEXT:       [[NIL_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT:       hop_to_executor [[NIL_EXECUTOR]] :
  //   Later, when we return from an async call, hop to the
  //   correct flow-sensitive value.
@@ -169,12 +169,12 @@ enum Birb {
 }

 // NI-LABEL:  sil hidden [ossa] @$s12initializers7makeCatyyYaF : $@convention(thin) @async () -> () {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          hop_to_executor [[BORROWED_EXECUTOR:%[0-9]+]]
 // NI:          end_borrow [[BORROWED_EXECUTOR]]
 // NI-NEXT:     {{%[0-9]+}} = apply {{%[0-9]+}}({{%[0-9]+}}, {{%[0-9]+}}) : $@convention(method) (@owned String, @thick Cat.Type) -> @owned Cat
-// NI:          hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:        } // end sil function '$s12initializers7makeCatyyYaF'

 // NI-NS-LABEL:  sil hidden [ossa] @$s12initializers7makeCatyyYaF : $@convention(thin) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>) -> () {
@@ -192,12 +192,12 @@ func makeCat() async {
 }

 // NI-LABEL:  sil hidden [ossa] @$s12initializers7makeDogyyYaF : $@convention(thin) @async () -> () {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          hop_to_executor [[BORROWED_EXEC:%.*]] :
 // NI-NEXT:     end_borrow [[BORROWED_EXEC]]
 // NI-NEXT:     {{%[0-9]+}} = apply {{%[0-9]+}}({{%[0-9]+}}, {{%[0-9]+}}) : $@convention(method) (@owned String, @thin Dog.Type) -> Dog
-// NI:          hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:        } // end sil function '$s12initializers7makeDogyyYaF'

 // NI-NS-LABEL: sil hidden [ossa] @$s12initializers7makeDogyyYaF : $@convention(thin) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>) -> () {
@@ -213,12 +213,12 @@ func makeDog() async {
 }

 // NI-LABEL:  sil hidden [ossa] @$s12initializers8makeBirbyyYaF : $@convention(thin) @async () -> () {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          hop_to_executor [[BORROWED_EXEC:%.*]] : $MainActor
 // NI-NEXT:     end_borrow [[BORROWED_EXEC]]
 // NI-NEXT:     {{%[0-9]+}} = apply {{%[0-9]+}}({{%[0-9]+}}, {{%[0-9]+}}) : $@convention(method) (@owned String, @thin Birb.Type) -> Birb
-// NI:          hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:        } // end sil function '$s12initializers8makeBirbyyYaF'

 // NI-NS-LABEL:  sil hidden [ossa] @$s12initializers8makeBirbyyYaF : $@convention(thin) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>) -> () {
@@ -238,7 +238,7 @@ actor SomeActor {

  // CHECK-LABEL: sil hidden [ossa] @$s12initializers9SomeActorCACyYacfc : $@convention(method) @async (@sil_isolated @owned SomeActor) -> @owned SomeActor {
  // CHECK:       bb0(%0 :
-  // CHECK-NEXT:    [[NIL_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK-NEXT:    [[NIL_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT:    hop_to_executor [[NIL_EXECUTOR]]
  init() async {}

@@ -260,10 +260,10 @@ func makeActor() async -> SomeActor {
 }

 // NI-LABEL: sil hidden [ossa] @$s12initializers20makeActorFromGenericAA04SomeC0CyYaF : $@convention(thin) @async () -> @owned SomeActor {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          apply
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI: } // end sil function '$s12initializers20makeActorFromGenericAA04SomeC0CyYaF'

 // NI-NS-LABEL: sil hidden [ossa] @$s12initializers20makeActorFromGenericAA04SomeC0CyYaF : $@convention(thin) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>) -> @owned SomeActor {
@@ -277,10 +277,10 @@ func makeActorFromGeneric() async -> SomeActor {
 }

 // NI-LABEL: sil hidden [ossa] @$s12initializers26callActorMethodFromGeneric1ayAA04SomeC0C_tYaF :
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          apply
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI: } // end sil function '$s12initializers26callActorMethodFromGeneric1ayAA04SomeC0C_tYaF'

 // NI-NS-LABEL: sil hidden [ossa] @$s12initializers26callActorMethodFromGeneric1ayAA04SomeC0C_tYaF : $@convention(thin) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Optional<any Actor>, @guaranteed SomeActor) -> () {
@@ -295,8 +295,8 @@ func callActorMethodFromGeneric(a: SomeActor) async {
 }

 // NI-LABEL: sil hidden {{.*}} @$s12initializers15makeActorInTaskyyYaF : $@convention(thin) @async () -> () {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          apply
 // NI: } // end sil function '$s12initializers15makeActorInTaskyyYaF'

@@ -307,17 +307,17 @@ func callActorMethodFromGeneric(a: SomeActor) async {
 // NI-NS: } // end sil function '$s12initializers15makeActorInTaskyyYaF'

 // NI-LABEL: sil private [ossa] @$s12initializers15makeActorInTaskyyYaFAA04SomeC0CyYacfU_ : $@convention(thin) @async @substituted <τ_0_0> (@guaranteed Optional<any Actor>) -> @out τ_0_0 for <SomeActor> {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          apply
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI: } // end sil function '$s12initializers15makeActorInTaskyyYaFAA04SomeC0CyYacfU_'

 // NI-NS-LABEL: sil private [ossa] @$s12initializers15makeActorInTaskyyYaFAA04SomeC0CyYacfU_ : $@convention(thin) @async @substituted <τ_0_0> (@guaranteed Optional<any Actor>) -> @out τ_0_0 for <SomeActor> {
-// NI-NS:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NS-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI-NS:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NS-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI-NS:          apply
-// NI-NS-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI-NS-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI-NS: } // end sil function '$s12initializers15makeActorInTaskyyYaFAA04SomeC0CyYacfU_'
@available(SwiftStdlib 5.1, *)
 func makeActorInTask() async {
@@ -325,8 +325,8 @@ func makeActorInTask() async {
 }

 // NI-LABEL: sil hidden {{.*}}  @$s12initializers21callActorMethodInTask1ayAA04SomeC0C_tYaF : $@convention(thin) @async (@guaranteed SomeActor) -> () {
-// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// NI:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// NI-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // NI:          apply
 // NI: } // end sil function '$s12initializers21callActorMethodInTask1ayAA04SomeC0C_tYaF'

@@ -336,10 +336,10 @@ func makeActorInTask() async {
 // NI-NS: } // end sil function '$s12initializers21callActorMethodInTask1ayAA04SomeC0C_tYaF'

 // CHECK-LABEL: sil private [ossa] @$s12initializers21callActorMethodInTask1ayAA04SomeC0C_tYaFyyYacfU_ : $@convention(thin) @async @substituted <τ_0_0> (@guaranteed Optional<any Actor>, @guaranteed SomeActor) -> @out τ_0_0 for <()> {
-// CHECK:          [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
-// CHECK-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK:          [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
+// CHECK-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 // CHECK:          apply
-// CHECK-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK-NEXT:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
@available(SwiftStdlib 5.1, *)
 func callActorMethodInTask(a: SomeActor) async {
  Task.detached { await a.someMethod() }
--- a/test/SILGen/execution_attr.swift
+++ b/test/SILGen/execution_attr.swift
@@ -38,9 +38,10 @@ struct S {

 // DISABLED: sil hidden [ossa] @$s14execution_attr0A11CallerFieldyyAA1SVYaF : $@convention(thin) @async (@guaranteed S) -> () {
 // DISABLED: bb0([[ARG:%.*]] : @guaranteed $S):
+// DISABLED:   [[ACTOR_NONE:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
+// DISABLED:   hop_to_executor [[ACTOR_NONE]]
 // DISABLED:   [[FIELD:%.*]] = struct_extract [[ARG]]
 // DISABLED:   [[FIELD_COPY:%.*]] = copy_value [[FIELD]]
-// DISABLED:   [[ACTOR_NONE:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
 // DISABLED:   [[BORROWED_FIELD:%.*]] = begin_borrow [[FIELD_COPY]]
 // DISABLED:   apply [[BORROWED_FIELD]]([[ACTOR_NONE]])
 // DISABLED: } // end sil function '$s14execution_attr0A11CallerFieldyyAA1SVYaF'
@@ -65,7 +66,7 @@ extension S {

 // CHECK-LABEL: sil hidden [ossa] @$s14execution_attr24testWithDynamicIsolation2fnyyyYAXE_tYaF : $@convention(thin) @async (@guaranteed @isolated(any) @noescape @callee_guaranteed () -> ()) -> () {
 // CHECK: bb0([[PARAM_FN:%.*]] : @guaranteed $@isolated(any) @noescape @callee_guaranteed () -> ()):
-// CHECK:   [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+// CHECK:   [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
 // CHECK-NEXT:   hop_to_executor [[GENERIC_EXEC]]
 // CHECK-NEXT:   [[FN:%.*]] = copy_value [[PARAM_FN]]
 // CHECK-NEXT:   [[BORROWED_FN:%.*]] = begin_borrow [[FN]]
--- a/test/SILGen/hop_to_executor.swift
+++ b/test/SILGen/hop_to_executor.swift
@@ -3,7 +3,7 @@

 // CHECK-LABEL: sil hidden [ossa] @$s4test16unspecifiedAsyncyyYaF : $@convention(thin) @async () -> ()
 // CHECK:         bb0:
-// CHECK-NEXT:      [[GENERIC:%[0-9]+]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+// CHECK-NEXT:      [[GENERIC:%[0-9]+]] = enum $Optional<any Actor>, #Optional.none!enumelt
 // CHECK-NEXT:      hop_to_executor [[GENERIC]]
 // CHECK:       } // end sil function '$s4test16unspecifiedAsyncyyYaF'
 func unspecifiedAsync() async {}
@@ -13,7 +13,7 @@ actor MyActor {
  private var p: Int

  // CHECK-LABEL: sil hidden [ossa] @$s4test7MyActorC6calleeyySiYaF : $@convention(method) @async (Int, @guaranteed MyActor) -> () {
-  // CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK:       hop_to_executor [[GENERIC_EXEC]] :
  // CHECK:     } // end sil function '$s4test7MyActorC6calleeyySiYaF'
  nonisolated func callee(_ x: Int) async {
@@ -21,7 +21,7 @@ actor MyActor {
  }

  // CHECK-LABEL: sil hidden [ossa] @$s4test7MyActorC14throwingCalleeyySiYaKF : $@convention(method) @async (Int, @guaranteed MyActor) -> @error any Error {
-  // CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK:       hop_to_executor [[GENERIC_EXEC]] :
  // CHECK:     } // end sil function '$s4test7MyActorC14throwingCalleeyySiYaKF'
  nonisolated func throwingCallee(_ x: Int) async throws {
@@ -283,7 +283,7 @@ struct BlueActor {
 }

 // CHECK-LABEL: sil hidden [ossa] @$s4test20unspecifiedAsyncFuncyyYaF : $@convention(thin) @async () -> () {
-// CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK-NEXT:    hop_to_executor [[GENERIC_EXEC]] :
 // CHECK:         [[BORROW:%[0-9]+]] = begin_borrow {{%[0-9]+}} : $RedActorImpl
 // CHECK-NEXT:    hop_to_executor [[BORROW]] : $RedActorImpl
@@ -298,7 +298,7 @@ func unspecifiedAsyncFunc() async {

 // CHECK-LABEL: sil hidden [ossa] @$s4test27anotherUnspecifiedAsyncFuncyyAA12RedActorImplCYaF : $@convention(thin) @async (@guaranteed RedActorImpl) -> () {
 // CHECK:       bb0([[RED:%[0-9]+]] : @guaranteed $RedActorImpl):
-// CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK-NEXT:    hop_to_executor [[GENERIC_EXEC]] :
 // CHECK:         [[INTARG:%[0-9]+]] = apply {{%[0-9]+}}({{%[0-9]+}}, {{%[0-9]+}}) : $@convention(method) (Builtin.IntLiteral, @thin Int.Type) -> Int
 // CHECK:         [[METH:%[0-9]+]] = class_method [[RED]] : $RedActorImpl, #RedActorImpl.hello : (isolated RedActorImpl) -> (Int) -> (), $@convention(method) (Int, @sil_isolated @guaranteed RedActorImpl) -> ()
@@ -311,14 +311,14 @@ func anotherUnspecifiedAsyncFunc(_ red : RedActorImpl) async {
 }

 // CHECK-LABEL: sil hidden [ossa] @$s4test0A20GlobalActorFuncValueyyyyAA03RedC0VYcXEYaF
-// CHECK: [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK: [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK: hop_to_executor [[GENERIC_EXEC]] :
 // CHECK: function_ref @$s4test8RedActorV6sharedAA0bC4ImplCvgZ
 // CHECK: hop_to_executor [[RED:%[0-9]+]] : $RedActorImpl
 // CHECK-NEXT: end_borrow [[RED]]
 // CHECK-NEXT: begin_borrow
 // CHECK-NEXT: apply
-// CHECK:      hop_to_executor [[GENERIC_EXEC:%[0-9]+]] : $Optional<Builtin.Executor>
+// CHECK:      hop_to_executor [[GENERIC_EXEC:%[0-9]+]] : $Optional<any Actor>
 func testGlobalActorFuncValue(_ fn: @RedActor () -> Void) async {
  await fn()
 }
@@ -482,18 +482,18 @@ extension MyActor {
 func testImplicitAsyncIsolatedParam(
  i: Int, d: Double, actor: MyActor, otherActor: MyActor
 ) async {
-  // CHECK: [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK: [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT: hop_to_executor [[GENERIC_EXEC]] :
  // CHECK: [[FN1:%.*]] = function_ref @$s4test19acceptIsolatedParamyySi_AA7MyActorCYiSdtF
  // CHECK-NEXT: hop_to_executor [[ACTOR:%.*]] : $MyActor
  // CHECK-NEXT: apply [[FN1]](%0, %2, %1) : $@convention(thin) (Int, @sil_isolated @guaranteed MyActor, Double) -> ()
-  // CHECK-NEXT: hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+  // CHECK-NEXT: hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
  await acceptIsolatedParam(i, actor, d)

  // CHECK: [[FN2:%.*]] = function_ref @$s4test7MyActorC13otherIsolatedyySi_ACYiSdtF : $@convention(method) (Int, @sil_isolated @guaranteed MyActor, Double, @guaranteed MyActor) -> ()
  // CHECK-NEXT: hop_to_executor [[ACTOR:%.*]] : $MyActor
  // CHECK-NEXT: apply [[FN2]](%0, %2, %1, %3) : $@convention(method) (Int, @sil_isolated @guaranteed MyActor, Double, @guaranteed MyActor) -> ()
-  // CHECK-NEXT: hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+  // CHECK-NEXT: hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
  await otherActor.otherIsolated(i, actor, d)
 }

--- a/test/SILGen/hop_to_executor_async_prop.swift
+++ b/test/SILGen/hop_to_executor_async_prop.swift
@@ -81,7 +81,7 @@ struct GlobalCat {

 // CHECK-LABEL: sil hidden [ossa] @$s4test015accessSweaterOfC03catAA0C0VAA3CatC_tYaF : $@convention(thin) @async (@guaranteed Cat) -> @owned Sweater {
 // CHECK:  bb0([[CAT:%[0-9]+]] : @guaranteed $Cat):
-// CHECK:    [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:    [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK:    hop_to_executor [[GENERIC_EXEC]] :
 // CHECK:    [[CAT_GETTER:%[0-9]+]] = class_method [[CAT]] : $Cat, #Cat.computedSweater!getter : (isolated Cat) -> () -> Sweater, $@convention(method) (@sil_isolated @guaranteed Cat) -> @owned Sweater
 // CHECK:    hop_to_executor [[CAT]] : $Cat
@@ -110,7 +110,7 @@ func accessSweaterOfSweater(cat : Cat) async -> Sweater {

 // CHECK-LABEL: sil hidden [ossa] @$s4test26accessGlobalIsolatedMember3catSSAA3CatC_tYaF : $@convention(thin) @async (@guaranteed Cat) -> @owned String {
 // CHECK:  bb0([[CAT:%[0-9]+]] : @guaranteed $Cat):
-// CHECK:    [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:    [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK:    hop_to_executor [[GENERIC_EXEC]] :

 // CHECK:    [[GETTER:%[0-9]+]] = class_method [[CAT]] : $Cat, #Cat.leader!getter : (Cat) -> () -> String, $@convention(method) (@guaranteed Cat) -> @owned String
@@ -443,21 +443,21 @@ struct Container {
    @GlobalCat var isoRef: CatBox = CatBox()

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV12accessTuple1SfyYaF : $@convention(method) @async (@guaranteed Container) -> Float {
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*(Optional<(Int, Int)>, Float)
    // CHECK:     [[ADDR:%[0-9]+]] = tuple_element_addr [[ACCESS]] : $*(Optional<(Int, Int)>, Float), 1
    // CHECK:     {{%[0-9]+}} = load [trivial] [[ADDR]] : $*Float
    // CHECK:     end_access [[ACCESS]] : $*(Optional<(Int, Int)>, Float)
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK: } // end sil function '$s4test9ContainerV12accessTuple1SfyYaF'
    func accessTuple1() async -> Float {
        return await globalCircle.1
    }

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV12accessTuple2SiSgyYaFZ : $@convention(method) @async (@thin Container.Type) -> Optional<Int> {
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*(Optional<(Int, Int)>, Float)
@@ -473,37 +473,37 @@ struct Container {
    // CHECK:     [[ELM_ADDR:%[0-9]+]] = tuple_element_addr [[TUPLE_ADDR]] : $*(Int, Int), 0
    // CHECK:     {{%[0-9]+}} = load [trivial] [[ELM_ADDR]] : $*Int
    // CHECK:     end_access [[ACCESS]] : $*(Optional<(Int, Int)>, Float)
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK: } // end sil function '$s4test9ContainerV12accessTuple2SiSgyYaFZ'
    static func accessTuple2() async -> Int? {
        return await globalCircle.0!.0
    }

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV12accessTuple3SfyYaF : $@convention(method) @async (@guaranteed Container) -> Float {
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     [[ADDRESS_ACCESSOR:%[0-9]+]] = function_ref @$s4test9ContainerV12staticCircleSi_SitSg_Sftvau : $@convention(thin) () -> Builtin.RawPointer
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     = apply [[ADDRESS_ACCESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*(Optional<(Int, Int)>, Float)
    // CHECK:     [[ADDR:%[0-9]+]] = tuple_element_addr [[ACCESS]] : $*(Optional<(Int, Int)>, Float), 1
    // CHECK:     {{%[0-9]+}} = load [trivial] [[ADDR]] : $*Float
    // CHECK:     end_access [[ACCESS]] : $*(Optional<(Int, Int)>, Float)
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK: } // end sil function '$s4test9ContainerV12accessTuple3SfyYaF'
    func accessTuple3() async -> Float {
        return await Container.staticCircle.1
    }

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV12accessTuple4SiSgyYaFZ : $@convention(method) @async (@thin Container.Type) -> Optional<Int> {
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     [[ADDRESS_ACCESSOR:%[0-9]+]] = function_ref @$s4test9ContainerV12staticCircleSi_SitSg_Sftvau : $@convention(thin) () -> Builtin.RawPointer
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     = apply [[ADDRESS_ACCESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*(Optional<(Int, Int)>, Float)
    // CHECK:     [[ADDR:%[0-9]+]] = tuple_element_addr [[ACCESS]] : $*(Optional<(Int, Int)>, Float), 0
@@ -518,7 +518,7 @@ struct Container {
    // CHECK:     [[ELM_ADDR:%[0-9]+]] = tuple_element_addr [[TUPLE_ADDR]] : $*(Int, Int), 0
    // CHECK:     {{%[0-9]+}} = load [trivial] [[ELM_ADDR]] : $*Int
    // CHECK:     end_access [[ACCESS]] : $*(Optional<(Int, Int)>, Float)
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK: } // end sil function '$s4test9ContainerV12accessTuple4SiSgyYaFZ'
    static func accessTuple4() async -> Int? {
        return await Container.staticCircle.0!.0
@@ -526,16 +526,16 @@ struct Container {


    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV8getCountSiyYaFZ : $@convention(method) @async (@thin Container.Type) -> Int {
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     [[ADDRESS_ACCESSOR:%[0-9]+]] = function_ref @$s4test9ContainerV7counterSivau : $@convention(thin) () -> Builtin.RawPointer
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     = apply [[ADDRESS_ACCESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK:   hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:   {{%[0-9]+}} = begin_access [read] [dynamic] {{%[0-9]+}} : $*Int
    // CHECK:   {{%[0-9]+}} = load [trivial] {{%[0-9]+}} : $*Int
-    // CHECK:   hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:   hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK: } // end sil function '$s4test9ContainerV8getCountSiyYaFZ'
    static func getCount() async -> Int {
        return await counter
@@ -544,12 +544,12 @@ struct Container {

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV8getValueSiSgyYaFZ : $@convention(method) @async (@thin Container.Type) -> Optional<Int> {
    // CHECK: bb0(%0 : $@thin Container.Type):
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     [[ADDRESS_ACCESSOR:%[0-9]+]] = function_ref @$s4test9ContainerV4thisACSgvau : $@convention(thin) () -> Builtin.RawPointer
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     = apply [[ADDRESS_ACCESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-    // CHECK:     hop_to_executor {{%[0-9]+}} : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor {{%[0-9]+}} : $Optional<any Actor>
    // CHECK:    [[MAIN:%[0-9]+]] = begin_borrow {{%[0-9]+}} : $MainActor
    // CHECK:    hop_to_executor [[MAIN]] : $MainActor
    // CHECK:    [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*Optional<Container>
@@ -558,11 +558,11 @@ struct Container {
    // CHECK: [[TRUE_BB]]:
    // CHECK:    {{%[0-9]+}} = load [trivial] {{%[0-9]+}} : $*Int
    // CHECK:    end_access [[ACCESS]] : $*Optional<Container>
-    // CHECK:    hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:    hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    //
    // CHECK: [[FALSE_BB]]:
    // CHECK:    end_access [[ACCESS]] : $*Optional<Container>
-    // CHECK:    hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:    hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    //
    // CHECK: } // end sil function '$s4test9ContainerV8getValueSiSgyYaFZ'
    static func getValue() async -> Int? {
@@ -571,12 +571,12 @@ struct Container {

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV10getOrCrashSfyYaFZ : $@convention(method) @async (@thin Container.Type) -> Float {
    // CHECK: bb0({{%[0-9]+}} : $@thin Container.Type):
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     [[ADDRESS_ACCESSOR:%[0-9]+]] = function_ref @$s4test9ContainerV4thisACSgvau : $@convention(thin) () -> Builtin.RawPointer
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     = apply [[ADDRESS_ACCESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK:     hop_to_executor {{%.*}} : $MainActor
    // CHECK:     [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*Optional<Container>
    // CHECK:     switch_enum_addr [[ACCESS]] : $*Optional<Container>, case #Optional.some!enumelt: [[SOME_BB:bb[0-9]+]], case #Optional.none!enumelt: [[CRASH_BB:bb[0-9]+]]
@@ -597,12 +597,12 @@ struct Container {

    // CHECK-LABEL: sil hidden [ossa] @$s4test9ContainerV13getRefOrCrashAA6CatBoxCyYaFZ : $@convention(method) @async (@thin Container.Type) -> @owned CatBox {
    // CHECK: bb0({{%[0-9]+}} : $@thin Container.Type):
-    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:     [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:     hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:     [[ADDRESS_ACCESSOR:%[0-9]+]] = function_ref @$s4test9ContainerV4thisACSgvau : $@convention(thin) () -> Builtin.RawPointer
    // CHECK:     hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:     = apply [[ADDRESS_ACCESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:     hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK:    hop_to_executor {{%.*}} : $MainActor
    // CHECK:    [[ACCESS:%[0-9]+]] = begin_access [read] [dynamic] {{%[0-9]+}} : $*Optional<Container>
    // CHECK:    switch_enum_addr [[ACCESS]] : $*Optional<Container>, case #Optional.some!enumelt: [[SOME_BB:bb[0-9]+]], case #Optional.none!enumelt: [[CRASH_BB:bb[0-9]+]]
@@ -642,18 +642,18 @@ struct Blah {

    // closure #1 in Blah.test()
    // CHECK-LABEL: sil private [ossa] @$s4test4BlahVAAyyFyyYacfU_ : $@convention(thin) @async @substituted <τ_0_0> (@guaranteed Optional<any Actor>, Blah) -> @out τ_0_0 for <()> {
-    // CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:       hop_to_executor [[GENERIC_EXEC]] :
    // CHECK:       hop_to_executor {{%[0-9]+}} : $MainActor
    // CHECK:       [[ACTOR_OBJ_RAW:%[0-9]+]] = apply {{%[0-9]+}}({{%[0-9]+}}) : $@convention(method) (Blah) -> @owned Coordinator
-    // CHECK:       hop_to_executor {{%[0-9]+}} : $Optional<Builtin.Executor>
+    // CHECK:       hop_to_executor {{%[0-9]+}} : $Optional<any Actor>
    // CHECK:       [[ACTOR_OBJ:%[0-9]+]] = begin_borrow [[ACTOR_OBJ_RAW]] : $Coordinator
    // CHECK:       [[VAL:%[0-9]+]] = ref_element_addr [[ACTOR_OBJ]] : $Coordinator, #Coordinator.someValue
    // CHECK:       hop_to_executor [[ACTOR_OBJ]]
    // CHECK:       [[VAL_ACCESS:%[0-9]+]] = begin_access [read] [dynamic] [[VAL]] : $*Optional<Int>
    // CHECK:       {{%[0-9]+}} = load [trivial] [[VAL_ACCESS]] : $*Optional<Int>
    // CHECK:       end_access [[VAL_ACCESS]] : $*Optional<Int>
-    // CHECK:       hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+    // CHECK:       hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
    // CHECK: } // end sil function '$s4test4BlahVAAyyFyyYacfU_'
    @available(SwiftStdlib 5.1, *)
    func test() {
@@ -677,16 +677,16 @@ class Polar {


 // CHECK-LABEL: sil hidden{{.*}} @$s4test20accessStaticIsolatedSiyYaF : $@convention(thin) @async () -> Int {
-// CHECK:        [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:        [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK:        hop_to_executor [[GENERIC_EXEC]] :
 // CHECK:        [[ADDRESSOR:%[0-9]+]] = function_ref @$s4test5PolarC11temperatureSivau : $@convention(thin) () -> Builtin.RawPointer
 // CHECK:        hop_to_executor {{%.*}} : $MainActor
 // CHECK-NEXT:   [[RAW_ADDR:%[0-9]+]] = apply [[ADDRESSOR]]() : $@convention(thin) () -> Builtin.RawPointer
-// CHECK-NEXT:   hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK-NEXT:   hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[ADDR:%[0-9]+]] = pointer_to_address [[RAW_ADDR]] : $Builtin.RawPointer to [strict] $*Int
 // CHECK:        hop_to_executor {{%.*}} : $MainActor
 // CHECK:        {{%.*}} = load [trivial] {{%.*}} : $*Int
-// CHECK:        hop_to_executor [[GENERIC_EXEC]] : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor [[GENERIC_EXEC]] : $Optional<any Actor>
 func accessStaticIsolated() async -> Int {
  return await Polar.temperature
 }
--- a/test/SILGen/isolated_any.swift
+++ b/test/SILGen/isolated_any.swift
@@ -3,7 +3,7 @@
 // REQUIRES: asserts

 // CHECK-LABEL: sil hidden [ossa] @$s4test8callSync2fnyyyYbYAXE_tYaF
-// CHECK:         [[NIL_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:         [[NIL_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK-NEXT:    hop_to_executor [[NIL_EXECUTOR]]
 // CHECK-NEXT:    [[FN_COPY:%.*]] = copy_value %0 : $@isolated(any) @noescape @Sendable @callee_guaranteed () -> ()
 // CHECK-NEXT:    [[FN_BORROW1:%.*]] = begin_borrow [[FN_COPY]] :
@@ -19,7 +19,7 @@ func callSync(fn: @isolated(any) @Sendable () -> ()) async {
 }

 // CHECK-LABEL: sil hidden [ossa] @$s4test9callAsync2fnyyyYaYbYAXE_tYaF
-// CHECK:         [[NIL_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+// CHECK:         [[NIL_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
 // CHECK-NEXT:    hop_to_executor [[NIL_EXECUTOR]]
 // CHECK-NEXT:    [[FN_COPY:%.*]] = copy_value %0 : $@isolated(any) @noescape @Sendable @async @callee_guaranteed () -> ()
 // CHECK-NEXT:    [[FN_BORROW2:%.*]] = begin_borrow [[FN_COPY]] :
--- a/test/SILGen/objc_async.swift
+++ b/test/SILGen/objc_async.swift
@@ -255,7 +255,7 @@ func testThrowingMethodFromMain(slowServer: SlowServer) async -> String {
 // rdar://91502776
 // CHECK-LABEL: sil hidden [ossa] @$s{{.*}}21checkCostcoMembershipSbyYaF : $@convention(thin) @async () -> Bool {
 // CHECK:    bb0:
-// CHECK:        hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[FINAL_BUF:%.*]] = alloc_stack $Bool
 // CHECK:        [[RESULT_BUF:%.*]] = alloc_stack $NSObject
 // CHECK:        [[METH:%.*]] = objc_method {{%.*}} : $@objc_metatype Person.Type, #Person.asCustomer!foreign
@@ -264,7 +264,7 @@ func testThrowingMethodFromMain(slowServer: SlowServer) async -> String {
 // CHECK:        dealloc_stack {{%.*}} : $*@block_storage
 // CHECK:        await_async_continuation {{%.*}} : $Builtin.RawUnsafeContinuation, resume bb1
 // CHECK:    bb1:
-// CHECK:        hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[RESULT:%.*]] = load [take] [[RESULT_BUF]] : $*NSObject
 // CHECK:        objc_method {{%.*}} : $CostcoManager, #CostcoManager.isCustomerEnrolled!foreign
 // CHECK:        get_async_continuation_addr Bool, [[FINAL_BUF]] : $*Bool
@@ -275,7 +275,7 @@ func testThrowingMethodFromMain(slowServer: SlowServer) async -> String {
 // CHECK:        dealloc_stack [[BLOCK_STORAGE]] : $*@block_storage
 // CHECK:        await_async_continuation {{%.*}} : $Builtin.RawUnsafeContinuation, resume bb2
 // CHECK:    bb2:
-// CHECK:        hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[ANSWER:%.*]] = load [trivial] [[FINAL_BUF]] : $*Bool
 // CHECK:        fix_lifetime [[EXTEND2]] : $CostcoManager
 // CHECK:        destroy_value [[EXTEND2]] : $CostcoManager
@@ -325,7 +325,7 @@ extension OptionalMemberLookups {
 // CHECK: destroy_value {{.*}} : $MainActor
 // CHECK: dealloc_stack {{.*}} : $*AutoreleasingUnsafeMutablePointer<Optional<NSError>>
 // CHECK: dealloc_stack {{.*}} : $*@sil_unmanaged Optional<NSError>
-// CHECK: hop_to_executor {{.*}} : $Optional<Builtin.Executor>
+// CHECK: hop_to_executor {{.*}} : $Optional<any Actor>
 // CHECK: switch_enum
 func checkHotdogs(_ v: some HotdogCompetitor, _ timeLimit: NSObject) async throws -> String? {
    return try await v.pileOfHotdogsToEat(withLimit: timeLimit)
--- a/test/SILGen/objc_async_checked.swift
+++ b/test/SILGen/objc_async_checked.swift
@@ -306,7 +306,7 @@ func testThrowingMethodFromMain(slowServer: SlowServer) async -> String {
 // rdar://91502776
 // CHECK-LABEL: sil hidden [ossa] @$s{{.*}}21checkCostcoMembershipSbyYaF : $@convention(thin) @async () -> Bool {
 // CHECK:    bb0:
-// CHECK:        hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[FINAL_BUF:%.*]] = alloc_stack $Bool
 // CHECK:        [[RESULT_BUF:%.*]] = alloc_stack $NSObject
 // CHECK:        [[METH:%.*]] = objc_method {{%.*}} : $@objc_metatype Person.Type, #Person.asCustomer!foreign
@@ -317,7 +317,7 @@ func testThrowingMethodFromMain(slowServer: SlowServer) async -> String {
 // CHECK:        dealloc_stack {{%.*}} : $*@block_storage
 // CHECK:        await_async_continuation {{%.*}} : $Builtin.RawUnsafeContinuation, resume bb1
 // CHECK:    bb1:
-// CHECK:        hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[RESULT:%.*]] = load [take] [[RESULT_BUF]] : $*NSObject
 // CHECK:        objc_method {{%.*}} : $CostcoManager, #CostcoManager.isCustomerEnrolled!foreign
 // CHECK:        get_async_continuation_addr Bool, [[FINAL_BUF]] : $*Bool
@@ -328,7 +328,7 @@ func testThrowingMethodFromMain(slowServer: SlowServer) async -> String {
 // CHECK:        dealloc_stack [[BLOCK_STORAGE]] : $*@block_storage
 // CHECK:        await_async_continuation {{%.*}} : $Builtin.RawUnsafeContinuation, resume bb2
 // CHECK:    bb2:
-// CHECK:        hop_to_executor {{%.*}} : $Optional<Builtin.Executor>
+// CHECK:        hop_to_executor {{%.*}} : $Optional<any Actor>
 // CHECK:        [[ANSWER:%.*]] = load [trivial] [[FINAL_BUF]] : $*Bool
 // CHECK:        fix_lifetime [[EXTEND2]] : $CostcoManager
 // CHECK:        destroy_value [[EXTEND2]] : $CostcoManager
--- a/test/SILGen/objc_async_from_swift.swift
+++ b/test/SILGen/objc_async_from_swift.swift
@@ -20,7 +20,7 @@ import ObjCConcurrency
 // CHECK-LABEL: sil {{.*}}@{{.*}}15testSlowServing
 func testSlowServing(p: SlowServing) async throws {
    // CHECK-NN: bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C: [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK-C: [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK: hop_to_executor [[HOP_TARGET]] :
    // CHECK: objc_method {{.*}} $@convention(objc_method) <τ_0_0 where τ_0_0 : SlowServing> (@convention(block) (Int) -> (), τ_0_0) -> ()
    // CHECK: hop_to_executor [[HOP_TARGET]] :
@@ -44,7 +44,7 @@ func testSlowServing(p: SlowServing) async throws {
 // CHECK-LABEL: sil {{.*}}@{{.*}}20testSlowServingAgain
 func testSlowServingAgain(p: SlowServing) async throws {
  // CHECK-NN: bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-  // CHECK-C: [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK-C: [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK: hop_to_executor [[HOP_TARGET]] :
  // CHECK: objc_method {{.*}} $@convention(objc_method) <τ_0_0 where τ_0_0 : SlowServing> (@convention(block) (Optional<NSString>, Optional<NSError>) -> (), τ_0_0) -> ()
  // CHECK: hop_to_executor [[HOP_TARGET]] :
@@ -56,7 +56,7 @@ func testSlowServingAgain(p: SlowServing) async throws {
 class SlowSwiftServer: NSObject, SlowServing {
    // CHECK-LABEL: sil {{.*}} @$s21objc_async_from_swift15SlowSwiftServerC10requestIntSiyYaF
    // CHECK-NN: bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:         hop_to_executor [[HOP_TARGET]] :
    // CHECK: } // end sil function '$s21objc_async_from_swift15SlowSwiftServerC10requestIntSiyYaF{{.*}}'
    // CHECK-LABEL: sil private {{.*}} @${{.*}}10requestInt{{.*}}To :
@@ -75,11 +75,11 @@ class SlowSwiftServer: NSObject, SlowServing {
    func requestString() async -> String { return "" }
    // CHECK-LABEL: sil {{.*}} @$s21objc_async_from_swift15SlowSwiftServerC13requestStringSSyYaF
    // CHECK-NN:    bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:         hop_to_executor [[HOP_TARGET]] :
    // CHECK-LABEL: sil {{.*}} @$s21objc_async_from_swift15SlowSwiftServerC16tryRequestStringSSyYaKF
    // CHECK-NN:    bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:         hop_to_executor [[HOP_TARGET]] :
    // CHECK-LABEL: sil shared {{.*}} @${{.*}}16tryRequestString{{.*}}U_To :
    // CHECK:         [[BLOCK_COPY:%.*]] = copy_block %0
@@ -96,13 +96,13 @@ class SlowSwiftServer: NSObject, SlowServing {

    // CHECK-LABEL: sil {{.*}} @$s21objc_async_from_swift15SlowSwiftServerC19requestIntAndStringSi_SStyYaF
    // CHECK-NN: bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:         hop_to_executor [[HOP_TARGET]] :
    func requestIntAndString() async -> (Int, String) { return (0, "") }

    // CHECK-LABEL: sil {{.*}} @$s21objc_async_from_swift15SlowSwiftServerC22tryRequestIntAndStringSi_SStyYaKF
    // CHECK-NN: bb0([[HOP_TARGET:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK-C:       [[HOP_TARGET:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK:         hop_to_executor [[HOP_TARGET]] :
    func tryRequestIntAndString() async throws -> (Int, String) { return (0, "") }
 }
@@ -205,7 +205,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC011doSomethingE8NullablyySiSSYaF : $@convention(method) @async (@guaranteed String, @guaranteed SlowServerlet) -> Int
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C:   hop_to_executor [[ACTOR]]
    // CHECK-C:   // end sil function '$s21objc_async_from_swift13SlowServerletC011doSomethingE8NullablyySiSSYaF'

@@ -236,7 +236,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC18findAnswerNullablyyS2SYaF : $@convention(method) @async (@guaranteed String, @guaranteed SlowServerlet) -> @owned String
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C-NEXT: hop_to_executor [[ACTOR]]
    // CHECK-C: } // end sil function '$s21objc_async_from_swift13SlowServerletC18findAnswerNullablyyS2SYaF'

@@ -263,7 +263,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC28doSomethingDangerousNullablyyS2SYaKF : $@convention(method) @async (@guaranteed String, @guaranteed SlowServerlet) -> (@owned String, @error any Error)
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C-NEXT: hop_to_executor [[ACTOR]]
    // CHECK-C: } // end sil function '$s21objc_async_from_swift13SlowServerletC28doSomethingDangerousNullablyyS2SYaKF'

@@ -291,7 +291,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC30doSomethingUnspecifiedNullablySSyYaKF : $@convention(method) @async (@guaranteed SlowServerlet) -> (@owned String, @error any Error)
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C-NEXT: hop_to_executor [[ACTOR]]
    // CHECK-C: } // end sil function '$s21objc_async_from_swift13SlowServerletC30doSomethingUnspecifiedNullablySSyYaKF'

@@ -317,7 +317,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC17doSomethingFlaggySSyYaKF : $@convention(method) @async (@guaranteed SlowServerlet) -> (@owned String, @error any Error)
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C-NEXT: hop_to_executor [[ACTOR]]
    // CHECK-C: } // end sil function '$s21objc_async_from_swift13SlowServerletC17doSomethingFlaggySSyYaKF'

@@ -349,7 +349,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC21doSomethingZeroFlaggySSyYaKF : $@convention(method) @async (@guaranteed SlowServerlet) -> (@owned String, @error any Error)
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C-NEXT: hop_to_executor [[ACTOR]]
    // CHECK-C: } // end sil function '$s21objc_async_from_swift13SlowServerletC21doSomethingZeroFlaggySSyYaKF'
    //
@@ -380,7 +380,7 @@ class SlowServerlet: SlowServer {
    //
    // CHECK-C-LABEL: sil hidden [ossa] @$s21objc_async_from_swift13SlowServerletC28doSomethingMultiResultFlaggySS_SStyYaKF : $@convention(method) @async (@guaranteed SlowServerlet) -> (@owned String, @owned String, @error any Error)
    // CHECK-C-NOT: bb0([[ACTOR:%.*]] : @guaranteed $Optional<any Actor>,
-    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C-NEXT: hop_to_executor [[ACTOR]]
    // CHECK-C: } // end sil function '$s21objc_async_from_swift13SlowServerletC28doSomethingMultiResultFlaggySS_SStyYaKF'
    //
@@ -561,7 +561,7 @@ func testAutoclosureInStaticMethod() {
    //
    // CHECK-C-LABEL: sil private [ossa] @$s21objc_async_from_swift29testAutoclosureInStaticMethodyyF9TestKlassL_C8getValue2id11valueForKeySSSgSS_S2SYaKXEtYaFZ : $@convention(method) @async (@guaranteed String, @guaranteed @noescape @async @callee_guaranteed (@guaranteed String) -> (@owned String, @error any Error), @thick TestKlass.Type) -> @owned Optional<String> {
    // CHECK-C: bb0([[STRING:%.*]] : @guaranteed $String, [[COMPLETION:%.*]] : @guaranteed $@noescape @async @callee_guaranteed (@guaranteed String) -> (@owned String, @error any Error), [[METATYPE:%.*]] : $@thick TestKlass.Type)
-    // CHECK-C:   [[EXEC_NONE:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C:   [[EXEC_NONE:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C:   hop_to_executor [[EXEC_NONE]]
    // CHECK-C:   hop_to_executor [[EXEC_NONE]]
    // CHECK-C:   hop_to_executor [[EXEC_NONE]]
@@ -693,7 +693,7 @@ func testAutoclosureInStaticMethod() {
    //
    // CHECK-C-LABEL: sil private [ossa] @$s21objc_async_from_swift29testAutoclosureInStaticMethodyyF9TestKlassL_C17getMainActorValue2id11valueForKeySSSgSS_S2SYaKXEtYaFZ : $@convention(method) @async (@guaranteed String, @guaranteed @noescape @async @callee_guaranteed (@guaranteed String) -> (@owned String, @error any Error), @thick TestKlass.Type) -> @owned Optional<String> {
    // CHECK-C: bb0([[STRING:%.*]] : @guaranteed $String, [[COMPLETION:%.*]] : @guaranteed $@noescape @async @callee_guaranteed (@guaranteed String) -> (@owned String, @error any Error), [[METATYPE:%.*]] : $@thick TestKlass.Type)
-    // CHECK-C:   [[EXEC_NONE:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK-C:   [[EXEC_NONE:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-C:   hop_to_executor [[EXEC_NONE]]
    // CHECK-C:   hop_to_executor [[EXEC_NONE]]
    // CHECK-C:   hop_to_executor [[EXEC_NONE]]
--- a/test/SILGen/objc_effectful_properties.swift
+++ b/test/SILGen/objc_effectful_properties.swift
@@ -52,7 +52,7 @@ func testAsyncThrows(eff : EffProps) async {

 // CHECK-LABEL: sil {{.*}}@${{.*}}17testMainActorProp
 func testMainActorProp(eff : EffProps) async {
-  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT:    hop_to_executor [[GENERIC_EXEC]] :
  // CHECK:         hop_to_executor [[GENERIC_EXEC]] :
  // CHECK: } // end sil function '${{.*}}17testMainActorProp
@@ -61,7 +61,7 @@ func testMainActorProp(eff : EffProps) async {

 // CHECK-LABEL: sil {{.*}}@${{.*}}19testMainActorMethod
 func testMainActorMethod(eff : EffProps) async {
-  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT:    hop_to_executor [[GENERIC_EXEC]] :
  // CHECK:         hop_to_executor [[GENERIC_EXEC]] :
  // CHECK: } // end sil function '${{.*}}19testMainActorMethod
--- a/test/SILGen/objc_effectful_properties_checked.swift
+++ b/test/SILGen/objc_effectful_properties_checked.swift
@@ -62,7 +62,7 @@ func testAsyncThrows(eff : EffProps) async {

 // CHECK-LABEL: sil {{.*}}@${{.*}}17testMainActorProp
 func testMainActorProp(eff : EffProps) async {
-  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT:    hop_to_executor [[GENERIC_EXEC]] :
  // CHECK:         hop_to_executor [[GENERIC_EXEC]] :
  // CHECK: } // end sil function '${{.*}}17testMainActorProp
@@ -71,7 +71,7 @@ func testMainActorProp(eff : EffProps) async {

 // CHECK-LABEL: sil {{.*}}@${{.*}}19testMainActorMethod
 func testMainActorMethod(eff : EffProps) async {
-  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+  // CHECK:         [[GENERIC_EXEC:%.*]] = enum $Optional<any Actor>, #Optional.none
  // CHECK-NEXT:    hop_to_executor [[GENERIC_EXEC]] :
  // CHECK:         hop_to_executor [[GENERIC_EXEC]] :
  // CHECK: } // end sil function '${{.*}}19testMainActorMethod
--- a/test/SILOptimizer/consuming_parameter.swift
+++ b/test/SILOptimizer/consuming_parameter.swift
@@ -5,7 +5,7 @@
 // CHECK-LABEL: sil [ossa] @async_dead_arg_call : {{.*}} {
 // CHECK:       {{bb[0-9]+}}([[INSTANCE:%[^,]+]] : @noImplicitCopy @_eagerMove @owned
 // CHECK:         destroy_value [[INSTANCE]]
-// CHECK:         [[EXECUTOR:%[^,]+]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt 
+// CHECK:         [[EXECUTOR:%[^,]+]] = enum $Optional<any Actor>, #Optional.none!enumelt 
 // CHECK:         [[CALLEE:%[^,]+]] = function_ref @async_callee
 // CHECK:         apply [[CALLEE]]()
 // CHECK:         hop_to_executor [[EXECUTOR]]
@@ -18,7 +18,7 @@ public func async_dead_arg_call(o: consuming AnyObject) async {
 
 // CHECK-LABEL: sil [ossa] @async_dead_arg_call_lexical : {{.*}} {
 // CHECK:       {{bb[0-9]+}}([[INSTANCE:%[^,]+]] : @noImplicitCopy @_lexical @owned
-// CHECK:         [[EXECUTOR:%[^,]+]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt 
+// CHECK:         [[EXECUTOR:%[^,]+]] = enum $Optional<any Actor>, #Optional.none!enumelt 
 // CHECK:         [[CALLEE:%[^,]+]] = function_ref @async_callee
 // CHECK:         apply [[CALLEE]]()
 // CHECK:         hop_to_executor [[EXECUTOR]]
@@ -47,7 +47,7 @@ public class C {
  // CHECK-LABEL: sil [ossa] @async_dead_arg_call_method : {{.*}} {
  // CHECK:       {{bb[0-9]+}}([[INSTANCE:%[^,]+]] : @noImplicitCopy @_eagerMove @owned
  // CHECK:         destroy_value [[INSTANCE]]
-  // CHECK:         [[EXECUTOR:%[^,]+]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt 
+  // CHECK:         [[EXECUTOR:%[^,]+]] = enum $Optional<any Actor>, #Optional.none!enumelt 
  // CHECK:         [[CALLEE:%[^,]+]] = function_ref @async_callee : $@convention(thin) @async () -> () 
  // CHECK:         apply [[CALLEE]]() : $@convention(thin) @async () -> () 
  // CHECK:         hop_to_executor [[EXECUTOR]]
--- a/test/SILOptimizer/definite_init_actor.swift
+++ b/test/SILOptimizer/definite_init_actor.swift
@@ -79,7 +79,7 @@ actor BoringActor {
    // CHECK:    bb0([[SELF:%[0-9]+]] : $SingleVarActor):
    //   TODO: We should be able to eliminate this by reasoning that the stores
    //     are to local memory.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    // CHECK:       [[EI:%.*]] = end_init_let_ref [[SELF]]
    // CHECK:       store {{%[0-9]+}} to [[ACCESS:%[0-9]+]]
@@ -96,7 +96,7 @@ actor BoringActor {
    // CHECK:   bb0({{%[0-9]+}} : $Int, [[SELF:%[0-9]+]] : $SingleVarActor):
    //   TODO: We should be able to eliminate this by reasoning that the stores
    //     are to local memory.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    // CHECK:       [[EI:%.*]] = end_init_let_ref [[SELF]]
    // CHECK:       [[MYVAR_REF:%[0-9]+]] = ref_element_addr [[EI]] : $SingleVarActor, #SingleVarActor.myVar
@@ -118,7 +118,7 @@ actor BoringActor {

    //   TODO: We should be able to eliminate this by reasoning that the stores
    //     are to local memory.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]

    // CHECK:       [[EI:%.*]] = end_init_let_ref [[SELF]]
@@ -150,7 +150,7 @@ actor BoringActor {

   //   TODO: We should be able to eliminate this by reasoning that the stores
   //     are to local memory.
-   // CHECK:   [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+   // CHECK:   [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
   // CHECK:   hop_to_executor [[GENERIC_EXECUTOR]]

   // CHECK:   cond_br {{%[0-9]+}}, [[SUCCESS_BB:bb[0-9]+]], {{bb[0-9]+}}
@@ -170,7 +170,7 @@ actor BoringActor {
   // CHECK:         [[SELF_ALLOC:%[0-9]+]] = alloc_stack [lexical] [var_decl] $SingleVarActor, let, name "self"

   //   Initial hop to the generic executor.
-   // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+   // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
   // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]

   //   Hop immediately after the call to the synchronous init.
@@ -219,7 +219,7 @@ actor DefaultInit {
    // CHECK:   bb0([[SELF:%[0-9]+]] : $DefaultInit):
    //   Initial hop to the generic executor.
    //   TODO: This should be easy to remove.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    // CHECK:       [[EI:%.*]] = end_init_let_ref [[SELF]]
    // CHECK:       store {{%[0-9]+}} to {{%[0-9]+}} : $*ActingError<Int>
@@ -231,7 +231,7 @@ actor DefaultInit {
    // CHECK:   bb0({{%[0-9]+}} : $Bool, [[SELF:%[0-9]+]] : $DefaultInit):
    //   Initial hop to the generic executor.
    //   TODO: This should be fairly easy to remove.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    // CHECK:       [[EI:%.*]] = end_init_let_ref [[SELF]]
    // CHECK:       store {{%[0-9]+}} to {{%[0-9]+}} : $*ActingError<Int>
@@ -253,7 +253,7 @@ actor MultiVarActor {
    // CHECK:   bb0({{%[0-9]+}} : $Bool, [[SELF:%[0-9]+]] : $MultiVarActor):
    //   Initial hop to the generic executor.
    //   TODO: This should be easy to remove.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    // CHECK:       [[EI:%.*]] = end_init_let_ref [[SELF]]
    // CHECK:       [[REF:%[0-9]+]] = ref_element_addr [[EI]] : $MultiVarActor, #MultiVarActor.firstVar
@@ -271,7 +271,7 @@ actor MultiVarActor {
    // CHECK-LABEL: sil hidden @$s4test13MultiVarActorC10noSuccCaseACSb_tYacfc : $@convention(method) @async (Bool, @sil_isolated @owned MultiVarActor) -> @owned MultiVarActor {
    //   Initial hop to the generic executor.
    //   TODO: This should be easy to remove.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]

    // CHECK:       store {{%[0-9]+}} to [[A1:%[0-9]+]] : $*Int
@@ -293,7 +293,7 @@ actor MultiVarActor {
    // CHECK-LABEL: sil hidden @$s4test13MultiVarActorC10noPredCaseACSb_tYacfc : $@convention(method) @async (Bool, @sil_isolated @owned MultiVarActor) -> @owned MultiVarActor {
    //   Initial hop to the generic executor.
    //   TODO: This should be easy to remove.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]

    // CHECK:       store {{%[0-9]+}} to [[ACCESS:%[0-9]+]] : $*Int
@@ -316,7 +316,7 @@ actor MultiVarActor {
    //   TODO: We should be able to remove this hop by proving that all the
    //     stores before return are local.  We don't really care about invalid
    //     code, of course, but it should fall out.
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    init?(doesNotFullyInit1: Bool) async {
        firstVar = 1
@@ -324,7 +324,7 @@ actor MultiVarActor {
    }

    // CHECK-LABEL: sil hidden @$s4test13MultiVarActorC17doesNotFullyInit2ACSb_tYacfc
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    init(doesNotFullyInit2: Bool) async {
        firstVar = 1
@@ -332,7 +332,7 @@ actor MultiVarActor {
    }

    // CHECK-LABEL: sil hidden @$s4test13MultiVarActorC17doesNotFullyInit3ACSb_tYaKcfc
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    init(doesNotFullyInit3: Bool) async throws {
        firstVar = 1
@@ -340,7 +340,7 @@ actor MultiVarActor {
    }

    // CHECK-LABEL: sil hidden @$s4test13MultiVarActorC17doesNotFullyInit4ACSgSb_tYacfc
-    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:       [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:  hop_to_executor [[GENERIC_EXECUTOR]]
    init?(doesNotFullyInit4: Bool) async {
        firstVar = 1
@@ -358,7 +358,7 @@ actor TaskMaster {
    // CHECK-LABEL: @$s4test10TaskMasterCACyYacfc : $@convention(method) @async (@sil_isolated @owned TaskMaster) -> @owned TaskMaster {
    //   Initial hop to the generic executor.
    //   TODO: This should be easy to remove.
-    // CHECK:           [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:           [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:      hop_to_executor [[GENERIC_EXECUTOR]]

    // CHECK:           [[ELM:%[0-9]+]] = ref_element_addr [[SELF:%[0-9]+]] : $TaskMaster, #TaskMaster.task
@@ -382,7 +382,7 @@ actor SomeActor {
    // CHECK-LABEL: sil hidden @$s4test9SomeActorCACyYacfc : $@convention(method) @async (@sil_isolated @owned SomeActor) -> @owned SomeActor {
    //   Initial hop to the generic executor.
    //   TODO: This should be easy to remove.
-    // CHECK:           [[GENERIC_EXECUTOR:%.*]] = enum $Optional<Builtin.Executor>, #Optional.none
+    // CHECK:           [[GENERIC_EXECUTOR:%.*]] = enum $Optional<any Actor>, #Optional.none
    // CHECK-NEXT:      hop_to_executor [[GENERIC_EXECUTOR]]

    // CHECK-NOT:       begin_access
@@ -397,7 +397,7 @@ actor Ahmad {
  
  // CHECK-LABEL: sil hidden @$s4test5AhmadCACyYacfc : $@convention(method) @async (@owned Ahmad) -> @owned Ahmad {
  // CHECK:         bb0{{.*}}:
-  // CHECK-NEXT:      [[GENERIC:%[0-9]+]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+  // CHECK-NEXT:      [[GENERIC:%[0-9]+]] = enum $Optional<any Actor>, #Optional.none!enumelt
  // CHECK-NEXT:      hop_to_executor [[GENERIC]]
  // CHECK:           store {{%[0-9]+}} to {{%[0-9]+}} : $*Int
  // CHECK: } // end sil function '$s4test5AhmadCACyYacfc'
@@ -412,7 +412,7 @@ actor Customer {

  // CHECK-LABEL: sil hidden @$s4test8CustomerCACyYaKcfc :
  init() async throws {
-    // CHECK:      [[GENERIC:%[0-9]+]] = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
+    // CHECK:      [[GENERIC:%[0-9]+]] = enum $Optional<any Actor>, #Optional.none!enumelt
    // CHECK-NEXT: hop_to_executor [[GENERIC]]
    // CHECK:      [[SELF:%.*]] = end_init_let_ref %0 : $Customer

--- a/test/SILOptimizer/definite_init_flow_sensitive_distributed_actor_self.swift
+++ b/test/SILOptimizer/definite_init_flow_sensitive_distributed_actor_self.swift
@@ -13,6 +13,9 @@ distributed actor NotCodableDA<ActorSystem>

  // CHECK-LABEL: sil hidden{{.*}}@$s4test12NotCodableDAC11actorSystemACyxGx_tYacfc : $@convention(method) @async <ActorSystem where ActorSystem : DistributedActorSystem, ActorSystem.SerializationRequirement == any Decodable & Encodable> (@in ActorSystem, @sil_isolated @owned NotCodableDA<ActorSystem>) -> @owned NotCodableDA<ActorSystem> {
  init(actorSystem: ActorSystem) async {
+    // CHECK: [[ISOLATION:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
+    // CHECK: hop_to_executor [[ISOLATION]]
+
    self.actorSystem = actorSystem

    // First use of #isolation, which is replaced by 'nil'.
--- a/test/embedded/concurrency-builtins.swift
+++ b/test/embedded/concurrency-builtins.swift
@@ -6,6 +6,7 @@
 // REQUIRES: swift_feature_Embedded

 import Builtin
+import _Concurrency

 public func test() async {
    _ = Builtin.createAsyncTask(0) { () async throws -> Int in