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// RUN: %target-swift-emit-silgen(mock-sdk: %clang-importer-sdk) -module-name retaining_globals -import-objc-header %S/Inputs/globals.h %s | %FileCheck %s
// REQUIRES: objc_interop
// This test makes sure loading from globals properly retains/releases loads from globals.
// NSString was the only real problem, as the compiler treats NSString globals specially.
// The rest of these are just hedges against future changes.
// From header:
// globalString: __strong NSString*
// globalObject: __strong NSObject*
// globalID: __strong id
// globalArray: __strong NSArray*
// globalConstArray: __strong NSArray *const
func main() {
Globals.sharedInstance() // Initialize globals (dispatch_once)
// CHECK: global_addr @globalConstArray : $*Optional<NSArray>
// CHECK: global_addr @globalArray : $*Optional<NSArray>
// CHECK: global_addr @globalId : $*Optional<AnyObject>
// CHECK: global_addr @globalObject : $*Optional<NSObject>
// CHECK: global_addr @globalString : $*NSString
// CHECK: [[globalString:%.*]] = load [copy] {{%.*}} : $*NSString
// CHECK: [[bridgeStringFunc:%.*]] = function_ref @{{.*}} : $@convention(method) (@guaranteed Optional<NSString>, @thin String.Type) -> @owned String
// CHECK: [[wrappedString:%.*]] = enum $Optional<NSString>, #Optional.some!enumelt, [[globalString]] : $NSString
// CHECK: [[stringMetaType:%.*]] = metatype $@thin String.Type
// CHECK: [[bridgedString:%.*]] = apply [[bridgeStringFunc]]([[wrappedString]], [[stringMetaType]]) : $@convention(method) (@guaranteed Optional<NSString>, @thin String.Type) -> @owned String
// CHECK: [[movedBridgedString:%.*]] = move_value [var_decl] [[bridgedString]]
let string = globalString // Problematic case, wasn't being retained
// CHECK: [[load_1:%.*]] = load [copy] {{%.*}} : $*Optional<NSObject>
// CHECK: [[move_1:%.*]] = move_value [lexical] [var_decl] [[load_1]]
let object = globalObject
// CHECK: [[load_2:%.*]] = load [copy] {{%.*}} : $*Optional<AnyObject>
// CHECK: [[move_2:%.*]] = move_value [lexical] [var_decl] [[load_2]]
let id = globalId
// CHECK: [[load_3:%.*]] = load [copy] {{%.*}} : $*Optional<NSArray>
// CHECK: [[move_3:%.*]] = move_value [lexical] [var_decl] [[load_3]]
let arr = globalArray
// CHECK: [[load_4:%.*]] = load [copy] {{%.*}} : $*Optional<NSArray>
// CHECK: [[move_4:%.*]] = move_value [lexical] [var_decl] [[load_4]]
let constArr = globalConstArray
// Make sure there's no more copies
// CHECK-NOT: load [copy]
print(string as Any)
print(object as Any)
print(id as Any)
print(arr as Any)
print(constArr as Any)
// CHECK: [[PRINT_FUN:%.*]] = function_ref @$ss5print_9separator10terminatoryypd_S2StF : $@convention(thin) (@guaranteed Array<Any>, @guaranteed String, @guaranteed String) -> ()
// CHECK: apply [[PRINT_FUN]]({{.*}})
// CHECK: destroy_value [[move_4]]
// CHECK: destroy_value [[move_3]]
// CHECK: destroy_value [[move_2]]
// CHECK: destroy_value [[move_1]]
// CHECK: destroy_value [[movedBridgedString]]
// Make sure there's no more destroys
// CHECK-NOT: destroy_value
// CHECK: } // end sil function '$s17retaining_globals4mainyyF'
}
main()
main() // Used to crash here, due to use-after-free.
main()
main()
main()
main()
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