Annotate thunks with the [thunk] attribute during SILGen.

Swift generates two entry points to @objc methods where one of
them is a thunk, and the inliner happily inlines the swift code
into the @objc thunk, effectively doubling the code size of some
@objc classes.

The performance inliner already knows not to inline large functions
into callers that are marked as thunks. This commit adds the [thunk]
attribute to the @objc thunks in an attempt to reduce code size.

rdar://22403108

Swift SVN r31498

lib/SILGen/SILGen.cpp

@@ -783,6 +783,7 @@ void SILGenModule::emitObjCMethodThunk(FuncDecl *method) {
   preEmitFunction(thunk, method, f, method);
   PrettyStackTraceSILFunction X("silgen emitObjCMethodThunk", f);
   f->setBare(IsBare);
+  f->setThunk(IsThunk);
   SILGenFunction(*this, *f).emitNativeToForeignThunk(thunk);
   postEmitFunction(thunk, f);
 }
@@ -810,6 +811,7 @@ void SILGenModule::emitObjCPropertyMethodThunks(AbstractStorageDecl *prop) {
     preEmitFunction(getter, prop, f, ThunkBodyLoc);
     PrettyStackTraceSILFunction X("silgen objc property getter thunk", f);
     f->setBare(IsBare);
+    f->setThunk(IsThunk);
     SILGenFunction(*this, *f).emitNativeToForeignThunk(getter);
     postEmitFunction(getter, f);
   }
@@ -827,6 +829,7 @@ void SILGenModule::emitObjCPropertyMethodThunks(AbstractStorageDecl *prop) {
   preEmitFunction(setter, prop, f, ThunkBodyLoc);
   PrettyStackTraceSILFunction X("silgen objc property setter thunk", f);
   f->setBare(IsBare);
+  f->setThunk(IsThunk);
   SILGenFunction(*this, *f).emitNativeToForeignThunk(setter);
   postEmitFunction(setter, f);
 }
@@ -848,6 +851,7 @@ void SILGenModule::emitObjCConstructorThunk(ConstructorDecl *constructor) {
   preEmitFunction(thunk, constructor, f, constructor);
   PrettyStackTraceSILFunction X("silgen objc constructor thunk", f);
   f->setBare(IsBare);
+  f->setThunk(IsThunk);
   SILGenFunction(*this, *f).emitNativeToForeignThunk(thunk);
   postEmitFunction(thunk, f);
 }
@@ -866,6 +870,7 @@ void SILGenModule::emitObjCDestructorThunk(DestructorDecl *destructor) {
   preEmitFunction(thunk, destructor, f, destructor);
   PrettyStackTraceSILFunction X("silgen objc destructor thunk", f);
   f->setBare(IsBare);
+  f->setThunk(IsThunk);
   SILGenFunction(*this, *f).emitNativeToForeignThunk(thunk);
   postEmitFunction(thunk, f);
 }

test/ClangModules/optional.swift

@@ -11,7 +11,7 @@ class A {
   @objc func foo() -> String? {
     return ""
   }
-// CHECK-LABEL:    sil hidden @_TToFC8optional1A3foofS0_FT_GSqSS_ : $@convention(objc_method) (A) -> @autoreleased Optional<NSString>
+// CHECK-LABEL:    sil hidden [thunk] @_TToFC8optional1A3foofS0_FT_GSqSS_ : $@convention(objc_method) (A) -> @autoreleased Optional<NSString>
 // CHECK:      [[T0:%.*]] = function_ref @_TFC8optional1A3foofS0_FT_GSqSS_
 // CHECK-NEXT: [[T1:%.*]] = apply [[T0]](%0)
 // CHECK-NEXT: strong_release
@@ -31,7 +31,7 @@ class A {
 // CHECK-NEXT: autorelease_return [[T0]]
 
   @objc func bar(x x : String?) {}
-// CHECK-LABEL:    sil hidden @_TToFC8optional1A3barfS0_FT1xGSqSS__T_ : $@convention(objc_method) (Optional<NSString>, A) -> ()
+// CHECK-LABEL:    sil hidden [thunk] @_TToFC8optional1A3barfS0_FT1xGSqSS__T_ : $@convention(objc_method) (Optional<NSString>, A) -> ()
 // CHECK:      [[T1:%.*]] = select_enum %0
 // CHECK-NEXT: cond_br [[T1]]
 //   Something branch: project value, translate, inject into result.

test/SIL/unimplemented_initializer.swift

@@ -14,6 +14,6 @@ class DesignatedStubs : Gizmo {
 // CHECK-DEBUG: sil hidden @_TFC25unimplemented_initializer15DesignatedStubscfMS0_FT7bellsOnSi_GSQS0__
 // CHECK-DEBUG: string_literal utf8 "{{.*}}unimplemented_initializer.swift"
 
-// CHECK-RELEASE: sil hidden @_TFC25unimplemented_initializer15DesignatedStubscfMS0_FT7bellsOnSi_GSQS0__
+// CHECK-RELEASE: sil hidden [thunk] @_TFC25unimplemented_initializer15DesignatedStubscfMS0_FT7bellsOnSi_GSQS0__
 // CHECK-RELEASE-NOT: unimplemented_initializer.swift"
 

test/SILGen/cf.swift

@@ -64,17 +64,17 @@ extension CCImpedance: ImpedanceType {}
 // CHECK-LABEL: sil shared [transparent] @_TFVSC11CCImpedanceg4imagSd
 
 class MyMagnetism : CCMagnetismModel {
-  // CHECK-LABEL: sil hidden @_TToFC2cf11MyMagnetism15getRefrigeratorfS0_FT_CSo14CCRefrigerator : $@convention(objc_method) (MyMagnetism) -> @autoreleased CCRefrigerator
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC2cf11MyMagnetism15getRefrigeratorfS0_FT_CSo14CCRefrigerator : $@convention(objc_method) (MyMagnetism) -> @autoreleased CCRefrigerator
   override func getRefrigerator() -> CCRefrigerator {
     return super.getRefrigerator()
   }
 
-  // CHECK-LABEL: sil hidden @_TToFC2cf11MyMagnetism16takeRefrigeratorfS0_FT_CSo14CCRefrigerator : $@convention(objc_method) (MyMagnetism) -> @owned CCRefrigerator
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC2cf11MyMagnetism16takeRefrigeratorfS0_FT_CSo14CCRefrigerator : $@convention(objc_method) (MyMagnetism) -> @owned CCRefrigerator
   override func takeRefrigerator() -> CCRefrigerator {
     return super.takeRefrigerator()
   }
 
-  // CHECK-LABEL: sil hidden @_TToFC2cf11MyMagnetism18borrowRefrigeratorfS0_FT_CSo14CCRefrigerator : $@convention(objc_method) (MyMagnetism) -> @autoreleased CCRefrigerator
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC2cf11MyMagnetism18borrowRefrigeratorfS0_FT_CSo14CCRefrigerator : $@convention(objc_method) (MyMagnetism) -> @autoreleased CCRefrigerator
   override func borrowRefrigerator() -> CCRefrigerator {
     return super.borrowRefrigerator()
   }

test/SILGen/dynamic.swift

@@ -63,25 +63,25 @@ protocol Proto {
 // CHECK-LABEL: sil hidden @_TFC7dynamic3FooCfMS0_FT4objcSi_S0_
 // CHECK:         function_ref @_TFC7dynamic3FoocfMS0_FT4objcSi_S0_
 
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3FoocfMS0_FT4objcSi_S0_
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3Foo10objcMethodfS0_FT_T_
-// CHECK-LABEL: sil hidden [transparent] @_TToFC7dynamic3Foog8objcPropSi
-// CHECK-LABEL: sil hidden [transparent] @_TToFC7dynamic3Foos8objcPropSi
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3Foog9subscriptFT4objcPSs9AnyObject__Si
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3Foos9subscriptFT4objcPSs9AnyObject__Si
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3FoocfMS0_FT4objcSi_S0_
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3Foo10objcMethodfS0_FT_T_
+// CHECK-LABEL: sil hidden [transparent] [thunk] @_TToFC7dynamic3Foog8objcPropSi
+// CHECK-LABEL: sil hidden [transparent] [thunk] @_TToFC7dynamic3Foos8objcPropSi
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3Foog9subscriptFT4objcPSs9AnyObject__Si
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3Foos9subscriptFT4objcPSs9AnyObject__Si
 
 // TODO: dynamic initializing ctor must be objc dispatched
 // CHECK-LABEL: sil hidden @_TFC7dynamic3FooCfMS0_FT7dynamicSi_S0_
 // CHECK:         function_ref @_TTDFC7dynamic3FoocfMS0_FT7dynamicSi_S0_
 // CHECK-LABEL: sil shared [transparent] @_TTDFC7dynamic3FoocfMS0_FT7dynamicSi_S0_
 // CHECK:         class_method [volatile] {{%.*}} : $Foo, #Foo.init!initializer.1.foreign :
 
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3FoocfMS0_FT7dynamicSi_S0_
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3Foo13dynamicMethodfS0_FT_T_
-// CHECK-LABEL: sil hidden [transparent] @_TToFC7dynamic3Foog11dynamicPropSi
-// CHECK-LABEL: sil hidden [transparent] @_TToFC7dynamic3Foos11dynamicPropSi
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3Foog9subscriptFT7dynamicSi_Si
-// CHECK-LABEL: sil hidden @_TToFC7dynamic3Foos9subscriptFT7dynamicSi_Si
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3FoocfMS0_FT7dynamicSi_S0_
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3Foo13dynamicMethodfS0_FT_T_
+// CHECK-LABEL: sil hidden [transparent] [thunk] @_TToFC7dynamic3Foog11dynamicPropSi
+// CHECK-LABEL: sil hidden [transparent] [thunk] @_TToFC7dynamic3Foos11dynamicPropSi
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3Foog9subscriptFT7dynamicSi_Si
+// CHECK-LABEL: sil hidden [thunk] @_TToFC7dynamic3Foos9subscriptFT7dynamicSi_Si
 
 // Protocol witnesses use best appropriate dispatch
 

test/SILGen/foreign_errors.swift

@@ -53,7 +53,7 @@ extension NSObject {
   @objc func abort() throws {
     throw NSError(domain: "", code: 1, userInfo: [:])
   }
-// CHECK-LABEL: sil hidden @_TToFE14foreign_errorsCSo8NSObject5abortfS0_FzT_T_ : $@convention(objc_method) (AutoreleasingUnsafeMutablePointer<Optional<NSError>>, NSObject) -> Bool
+// CHECK-LABEL: sil hidden [thunk] @_TToFE14foreign_errorsCSo8NSObject5abortfS0_FzT_T_ : $@convention(objc_method) (AutoreleasingUnsafeMutablePointer<Optional<NSError>>, NSObject) -> Bool
 // CHECK: [[T0:%.*]] = function_ref @_TFE14foreign_errorsCSo8NSObject5abortfS0_FzT_T_ : $@convention(method) (@guaranteed NSObject) -> @error ErrorType
 // CHECK: try_apply [[T0]](
 // CHECK: bb1(
@@ -78,7 +78,7 @@ extension NSObject {
   @objc func badDescription() throws -> String {
     throw NSError(domain: "", code: 1, userInfo: [:])
   }
-// CHECK-LABEL: sil hidden @_TToFE14foreign_errorsCSo8NSObject14badDescriptionfS0_FzT_SS : $@convention(objc_method) (AutoreleasingUnsafeMutablePointer<Optional<NSError>>, NSObject) -> @autoreleased Optional<NSString>
+// CHECK-LABEL: sil hidden [thunk] @_TToFE14foreign_errorsCSo8NSObject14badDescriptionfS0_FzT_SS : $@convention(objc_method) (AutoreleasingUnsafeMutablePointer<Optional<NSError>>, NSObject) -> @autoreleased Optional<NSString>
 // CHECK: [[T0:%.*]] = function_ref @_TFE14foreign_errorsCSo8NSObject14badDescriptionfS0_FzT_SS : $@convention(method) (@guaranteed NSObject) -> (@owned String, @error ErrorType)
 // CHECK: try_apply [[T0]](
 // CHECK: bb1([[RESULT:%.*]] : $String):
@@ -100,11 +100,11 @@ extension NSObject {
 // CHECK: bb3([[T0:%.*]] : $Optional<NSString>):
 // CHECK:   autorelease_return [[T0]] : $Optional<NSString>
 
-// CHECK-LABEL: sil hidden @_TToFE14foreign_errorsCSo8NSObject7takeIntfS0_FzSiT_ : $@convention(objc_method) (Int, AutoreleasingUnsafeMutablePointer<Optional<NSError>>, NSObject) -> Bool
+// CHECK-LABEL: sil hidden [thunk] @_TToFE14foreign_errorsCSo8NSObject7takeIntfS0_FzSiT_ : $@convention(objc_method) (Int, AutoreleasingUnsafeMutablePointer<Optional<NSError>>, NSObject) -> Bool
 // CHECK: bb0([[I:%[0-9]+]] : $Int, [[ERROR:%[0-9]+]] : $AutoreleasingUnsafeMutablePointer<Optional<NSError>>, [[SELF:%[0-9]+]] : $NSObject)
   @objc func takeInt(i: Int) throws { }
 
-// CHECK-LABEL: sil hidden @_TToFE14foreign_errorsCSo8NSObject10takeDoublefS0_FzTSd3intSi7closureFSiSi_T_ : $@convention(objc_method) (Double, Int, AutoreleasingUnsafeMutablePointer<Optional<NSError>>, @convention(block) (Int) -> Int, NSObject) -> Bool
+// CHECK-LABEL: sil hidden [thunk] @_TToFE14foreign_errorsCSo8NSObject10takeDoublefS0_FzTSd3intSi7closureFSiSi_T_ : $@convention(objc_method) (Double, Int, AutoreleasingUnsafeMutablePointer<Optional<NSError>>, @convention(block) (Int) -> Int, NSObject) -> Bool
 // CHECK: bb0([[D:%[0-9]+]] : $Double, [[INT:%[0-9]+]] : $Int, [[ERROR:%[0-9]+]] : $AutoreleasingUnsafeMutablePointer<Optional<NSError>>, [[CLOSURE:%[0-9]+]] : $@convention(block) (Int) -> Int, [[SELF:%[0-9]+]] : $NSObject):
   @objc func takeDouble(d: Double, int: Int, closure: (Int) -> Int) throws {
     throw NSError(domain: "", code: 1, userInfo: [:])
@@ -179,7 +179,7 @@ class ExtremelyErrorProne : ErrorProne {
   override func conflict3(obj: AnyObject, error: ()) throws {}
 }
 // CHECK: sil hidden @_TFC14foreign_errors19ExtremelyErrorProne9conflict3fS0_FzTPSs9AnyObject_5errorT__T_
-// CHECK: sil hidden @_TToFC14foreign_errors19ExtremelyErrorProne9conflict3fS0_FzTPSs9AnyObject_5errorT__T_ : $@convention(objc_method) (AnyObject, AutoreleasingUnsafeMutablePointer<Optional<NSError>>, ExtremelyErrorProne) -> Bool
+// CHECK: sil hidden [thunk] @_TToFC14foreign_errors19ExtremelyErrorProne9conflict3fS0_FzTPSs9AnyObject_5errorT__T_ : $@convention(objc_method) (AnyObject, AutoreleasingUnsafeMutablePointer<Optional<NSError>>, ExtremelyErrorProne) -> Bool
 
 // These conventions are usable because of swift_error. rdar://21715350
 func testNonNilError() throws -> Float {

test/SILGen/guaranteed_self.swift

@@ -287,7 +287,7 @@ class C: Fooable, Barrable {
   // CHECK:         return [[MARKED_SELF]]
 
   // @objc thunk for initializing constructor
-  // CHECK-LABEL: sil hidden @_TToFC15guaranteed_self1CcfMS0_FT_S0_ : $@convention(objc_method) (@owned C) -> @owned C
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC15guaranteed_self1CcfMS0_FT_S0_ : $@convention(objc_method) (@owned C) -> @owned C
   // CHECK:       bb0([[SELF:%.*]] : $C):
   // CHECK-NOT:     retain{{.*}} [[SELF]]
   // CHECK:         [[SELF2:%.*]] = apply {{%.*}}([[SELF]])
@@ -302,7 +302,7 @@ class C: Fooable, Barrable {
   // CHECK-NOT:     retain
   // CHECK-NOT:     release
 
-  // CHECK-LABEL: sil hidden @_TToFC15guaranteed_self1C3foofS0_FSiT_ : $@convention(objc_method) (Int, C) -> () {
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC15guaranteed_self1C3foofS0_FSiT_ : $@convention(objc_method) (Int, C) -> () {
   // CHECK:       bb0({{.*}} [[SELF:%.*]] : $C):
   // CHECK:         retain{{.*}} [[SELF]]
   // CHECK:         apply {{.*}} [[SELF]]
@@ -318,14 +318,14 @@ class C: Fooable, Barrable {
     self.bas()
   }
 
-  // CHECK-LABEL: sil hidden [transparent] @_TToFC15guaranteed_self1Cg5prop1Si : $@convention(objc_method) (C) -> Int
+  // CHECK-LABEL: sil hidden [transparent] [thunk] @_TToFC15guaranteed_self1Cg5prop1Si : $@convention(objc_method) (C) -> Int
   // CHECK:       bb0([[SELF:%.*]] : $C):
   // CHECK:         retain{{.*}} [[SELF]]
   // CHECK:         apply {{.*}}([[SELF]])
   // CHECK:         release{{.*}} [[SELF]]
   // CHECK-NOT:     release{{.*}} [[SELF]]
 
-  // CHECK-LABEL: sil hidden [transparent] @_TToFC15guaranteed_self1Cs5prop1Si : $@convention(objc_method) (Int, C) -> ()
+  // CHECK-LABEL: sil hidden [transparent] [thunk] @_TToFC15guaranteed_self1Cs5prop1Si : $@convention(objc_method) (Int, C) -> ()
   // CHECK:       bb0({{.*}} [[SELF:%.*]] : $C):
   // CHECK:         retain{{.*}} [[SELF]]
   // CHECK:         apply {{.*}} [[SELF]]

test/SILGen/objc_blocks_bridging.swift

@@ -5,7 +5,7 @@
 import Foundation
 
 @objc class Foo {
-  // CHECK-LABEL: sil hidden @_TToFC20objc_blocks_bridging3Foo3foo
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC20objc_blocks_bridging3Foo3foo
   // CHECK:         [[COPY:%.*]] = copy_block %0
   // CHECK:         [[THUNK:%.*]] = function_ref @_TTRXFdCb_dSi_dSi_XFo_dSi_dSi_
   // CHECK:         [[BRIDGED:%.*]] = partial_apply [[THUNK]]([[COPY]])
@@ -15,7 +15,7 @@ import Foundation
     return f(x)
   }
 
-  // CHECK-LABEL: sil hidden @_TToFC20objc_blocks_bridging3Foo3bar
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC20objc_blocks_bridging3Foo3bar
   // CHECK:         [[COPY:%.*]] = copy_block %0
   // CHECK:         [[THUNK:%.*]] = function_ref @_TTRXFdCb_dCSo8NSString_aS__XFo_oSS_oSS_
   // CHECK:         [[BRIDGED:%.*]] = partial_apply [[THUNK]]([[COPY]])
@@ -25,7 +25,7 @@ import Foundation
     return f(x)
   }
 
-  // CHECK-LABEL: sil hidden @_TToFC20objc_blocks_bridging3Foo3bas
+  // CHECK-LABEL: sil hidden [thunk]  @_TToFC20objc_blocks_bridging3Foo3bas
   // CHECK:         [[COPY:%.*]] = copy_block %0
   // CHECK:         [[THUNK:%.*]] = function_ref @_TTRXFdCb_dGSqCSo8NSString__aGSqS___XFo_oGSqSS__oGSqSS__
   // CHECK:         [[BRIDGED:%.*]] = partial_apply [[THUNK]]([[COPY]])
@@ -35,7 +35,7 @@ import Foundation
     return f(x)
   }
 
-  // CHECK-LABEL: sil hidden @_TToFC20objc_blocks_bridging3Foo16cFunctionPointerfS0_FTcSiSi1xSi_Si : $@convention(objc_method) (@convention(c) (Int) -> Int, Int, Foo) -> Int
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC20objc_blocks_bridging3Foo16cFunctionPointerfS0_FTcSiSi1xSi_Si : $@convention(objc_method) (@convention(c) (Int) -> Int, Int, Foo) -> Int
   // CHECK:       bb0([[F:%.*]] : $@convention(c) (Int) -> Int, [[X:%.*]] : $Int, [[SELF:%.*]] : $Foo):
   // CHECK:         [[NATIVE:%.*]] = function_ref @_TFC20objc_blocks_bridging3Foo16cFunctionPointerfS0_FTcSiSi1xSi_Si
   // CHECK:         apply [[NATIVE]]([[F]], [[X]], [[SELF]])
@@ -44,7 +44,7 @@ import Foundation
   }
 
   // Blocks and C function pointers must not be reabstracted when placed in optionals.
-  // CHECK-LABEL: sil hidden @_TToFC20objc_blocks_bridging3Foo7optFunc
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC20objc_blocks_bridging3Foo7optFunc
   // CHECK:         [[COPY:%.*]] = copy_block %0
   // CHECK:         [[BLOCK:%.*]] = unchecked_enum_data [[COPY]]
   // TODO: redundant reabstractions here

test/SILGen/objc_bool_bridging.swift

@@ -172,18 +172,18 @@ public func testFunctionPointerMethods(x: Test) {
 
 class NewClass : NSObject {
   // CHECK-LABEL: sil hidden @_TFC18objc_bool_bridging8NewClass12takesClosurefS0_FFSbSbT_ : $@convention(method) (@owned @callee_owned (Bool) -> Bool, @guaranteed NewClass) -> () {
-  // CHECK-OBJCBOOL-LABEL: sil hidden @_TToFC18objc_bool_bridging8NewClass12takesClosurefS0_FFSbSbT_ : $@convention(objc_method) (@convention(block) (ObjCBool) -> ObjCBool, NewClass) -> () {
+  // CHECK-OBJCBOOL-LABEL: sil hidden [thunk] @_TToFC18objc_bool_bridging8NewClass12takesClosurefS0_FFSbSbT_ : $@convention(objc_method) (@convention(block) (ObjCBool) -> ObjCBool, NewClass) -> () {
   func takesClosure(_: (Bool) -> Bool) {}
 
   // CHECK-LABEL: sil hidden @_TFC18objc_bool_bridging8NewClass15takesCBoolBlockfS0_FbSbSbT_ : $@convention(method) (@owned @convention(block) (Bool) -> Bool, @guaranteed NewClass) -> () {
-  // CHECK-LABEL: sil hidden @_TToFC18objc_bool_bridging8NewClass15takesCBoolBlockfS0_FbSbSbT_ : $@convention(objc_method) (@convention(block) (Bool) -> Bool, NewClass) -> () {
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC18objc_bool_bridging8NewClass15takesCBoolBlockfS0_FbSbSbT_ : $@convention(objc_method) (@convention(block) (Bool) -> Bool, NewClass) -> () {
   func takesCBoolBlock(_: @convention(block) (Bool) -> Bool) {}
 
   // CHECK-OBJCBOOL-LABEL: sil hidden @_TFC18objc_bool_bridging8NewClass18takesObjCBoolBlockfS0_FbV10ObjectiveC8ObjCBoolS2_T_ : $@convention(method) (@owned @convention(block) (ObjCBool) -> ObjCBool, @guaranteed NewClass) -> () {
-  // CHECK-OBJCBOOL-LABEL: sil hidden @_TToFC18objc_bool_bridging8NewClass18takesObjCBoolBlockfS0_FbV10ObjectiveC8ObjCBoolS2_T_ : $@convention(objc_method) (@convention(block) (ObjCBool) -> ObjCBool, NewClass) -> () {
+  // CHECK-OBJCBOOL-LABEL: sil hidden [thunk] @_TToFC18objc_bool_bridging8NewClass18takesObjCBoolBlockfS0_FbV10ObjectiveC8ObjCBoolS2_T_ : $@convention(objc_method) (@convention(block) (ObjCBool) -> ObjCBool, NewClass) -> () {
   func takesObjCBoolBlock(_: @convention(block) (ObjCBool) -> ObjCBool) {}
 
   // CHECK-LABEL: sil hidden @_TFC18objc_bool_bridging8NewClass23takesDarwinBooleanBlockfS0_FbV6Darwin13DarwinBooleanS2_T_ : $@convention(method) (@owned @convention(block) (DarwinBoolean) -> DarwinBoolean, @guaranteed NewClass) -> () {
-  // CHECK-LABEL: sil hidden @_TToFC18objc_bool_bridging8NewClass23takesDarwinBooleanBlockfS0_FbV6Darwin13DarwinBooleanS2_T_ : $@convention(objc_method) (@convention(block) (DarwinBoolean) -> DarwinBoolean, NewClass) -> () {
+  // CHECK-LABEL: sil hidden [thunk] @_TToFC18objc_bool_bridging8NewClass23takesDarwinBooleanBlockfS0_FbV6Darwin13DarwinBooleanS2_T_ : $@convention(objc_method) (@convention(block) (DarwinBoolean) -> DarwinBoolean, NewClass) -> () {
   func takesDarwinBooleanBlock(_: @convention(block) (DarwinBoolean) -> DarwinBoolean) {}
 }