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swift-mirror/test/SILGen/collection_downcast.swift
Hamish Knight d69a42d656 [CS] Preserve compatibility for collection coercions 
Previously we could allow some invalid coercions to
sneak past Sema. In most cases these would either
cause crashes later down the pipeline or
miscompiles. However, for coercions between
collections, we emitted somewhat reasonable code
that performed a force cast.

This commit aims to preserve compatibility with
those collection coercions that previously
compiled, and emits a warning telling the user to
use either 'as?' or 'as!' instead.
2020-04-10 10:16:07 -07:00

301 lines
20 KiB
Swift
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// RUN: %target-swift-emit-silgen -module-name collection_downcast -sdk %S/Inputs -I %S/Inputs -enable-source-import %s | %FileCheck %s
// REQUIRES: objc_interop
import Foundation
// FIXME: Should go into the standard library.
public extension _ObjectiveCBridgeable {
static func _unconditionallyBridgeFromObjectiveC(_ source: _ObjectiveCType?)
-> Self {
var result: Self?
_forceBridgeFromObjectiveC(source!, result: &result)
return result!
}
}
class BridgedObjC : NSObject { }
func == (x: BridgedObjC, y: BridgedObjC) -> Bool { return true }
struct BridgedSwift : Hashable, _ObjectiveCBridgeable {
func hash(into hasher: inout Hasher) {}
func _bridgeToObjectiveC() -> BridgedObjC {
return BridgedObjC()
}
static func _forceBridgeFromObjectiveC(
_ x: BridgedObjC,
result: inout BridgedSwift?
) {
}
static func _conditionallyBridgeFromObjectiveC(
_ x: BridgedObjC,
result: inout BridgedSwift?
) -> Bool {
return true
}
}
func == (x: BridgedSwift, y: BridgedSwift) -> Bool { return true }
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast17testArrayDowncast{{.*}}F
// CHECK: bb0([[ARRAY:%[0-9]+]] : @guaranteed $Array<AnyObject>):
func testArrayDowncast(_ array: [AnyObject]) -> [BridgedObjC] {
// CHECK: [[ARRAY_COPY:%.*]] = copy_value [[ARRAY]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss15_arrayForceCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<AnyObject, BridgedObjC>([[ARRAY_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
return array as! [BridgedObjC]
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast27testArrayDowncastFromObject{{.*}}F
// CHECK: bb0([[OBJ:%[0-9]+]] : @guaranteed $AnyObject):
func testArrayDowncastFromObject(_ obj: AnyObject) -> [BridgedObjC] {
// CHECK: unconditional_checked_cast_addr AnyObject in [[OBJECT_ALLOC:%[0-9]+]] : $*AnyObject to Array<BridgedObjC> in [[VALUE_ALLOC:%[0-9]+]] : $*Array<BridgedObjC>
return obj as! [BridgedObjC]
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast28testArrayDowncastFromNSArray{{.*}}F
// CHECK: bb0([[NSARRAY_OBJ:%[0-9]+]] : @guaranteed $NSArray):
func testArrayDowncastFromNSArray(_ obj: NSArray) -> [BridgedObjC] {
// CHECK: unconditional_checked_cast_addr NSArray in [[OBJECT_ALLOC:%[0-9]+]] : $*NSArray to Array<BridgedObjC> in [[VALUE_ALLOC:%[0-9]+]] : $*Array<BridgedObjC>
return obj as! [BridgedObjC]
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast28testArrayDowncastConditional{{.*}}F
// CHECK: bb0([[ARRAY:%[0-9]+]] : @guaranteed $Array<AnyObject>):
func testArrayDowncastConditional(_ array: [AnyObject]) -> [BridgedObjC]? {
// CHECK: [[ARRAY_COPY:%.*]] = copy_value [[ARRAY]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss21_arrayConditionalCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<AnyObject, BridgedObjC>([[ARRAY_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Optional<Array<τ_0_1>>
return array as? [BridgedObjC]
}
// CHECK: } // end sil function '$s19collection_downcast28testArrayDowncastConditional{{.*}}F'
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast12testArrayIsa{{.*}}F
// CHECK: bb0([[ARRAY:%[0-9]+]] : @guaranteed $Array<AnyObject>)
func testArrayIsa(_ array: [AnyObject]) -> Bool {
// CHECK: [[ARRAY_COPY:%.*]] = copy_value [[ARRAY]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss21_arrayConditionalCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<AnyObject, BridgedObjC>([[ARRAY_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Optional<Array<τ_0_1>>
// CHECK-NOT: destroy_value [[ARRAY]]
return array is [BridgedObjC] ? true : false
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast24testArrayDowncastBridged{{.*}}F
// CHECK: bb0([[ARRAY:%[0-9]+]] : @guaranteed $Array<AnyObject>):
func testArrayDowncastBridged(_ array: [AnyObject]) -> [BridgedSwift] {
// CHECK: [[ARRAY_COPY:%.*]] = copy_value [[ARRAY]]
// CHECK: [[BRIDGE_FN:%[0-9]+]] = function_ref @$ss15_arrayForceCast{{.*}}F
// CHECK: apply [[BRIDGE_FN]]<AnyObject, BridgedSwift>([[ARRAY_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
// CHECK-NOT: destroy_value [[ARRAY]]
return array as! [BridgedSwift]
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast35testArrayDowncastBridgedConditional{{.*}}F
// CHECK: bb0([[ARRAY:%[0-9]+]] : @guaranteed $Array<AnyObject>):
func testArrayDowncastBridgedConditional(_ array: [AnyObject]) -> [BridgedSwift]?{
// CHECK: [[ARRAY_COPY:%.*]] = copy_value [[ARRAY]]
// CHECK: [[BRIDGE_FN:%[0-9]+]] = function_ref @$ss21_arrayConditionalCast{{.*}}F
// CHECK: apply [[BRIDGE_FN]]<AnyObject, BridgedSwift>([[ARRAY_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Optional<Array<τ_0_1>>
// CHECK-NOT: destroy_value [[ARRAY]]
return array as? [BridgedSwift]
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast19testArrayIsaBridged{{.*}}F
// CHECK: bb0([[ARRAY:%[0-9]+]] : @guaranteed $Array<AnyObject>)
func testArrayIsaBridged(_ array: [AnyObject]) -> Bool {
// CHECK: [[ARRAY_COPY:%.*]] = copy_value [[ARRAY]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss21_arrayConditionalCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<AnyObject, BridgedSwift>([[ARRAY_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Optional<Array<τ_0_1>>
// CHECK-NOT: destroy_value [[ARRAY]]
return array is [BridgedSwift] ? true : false
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast32testDictionaryDowncastFromObject{{.*}}F
// CHECK: bb0([[OBJ:%[0-9]+]] : @guaranteed $AnyObject):
func testDictionaryDowncastFromObject(_ obj: AnyObject)
-> Dictionary<BridgedObjC, BridgedObjC> {
// CHECK: unconditional_checked_cast_addr AnyObject in [[OBJECT_ALLOC:%[0-9]+]] : $*AnyObject to Dictionary<BridgedObjC, BridgedObjC> in [[VALUE_ALLOC:%[0-9]+]] : $*Dictionary<BridgedObjC, BridgedObjC>
return obj as! Dictionary<BridgedObjC, BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast22testDictionaryDowncast{{.*}}F
// CHECK: bb0([[DICT:%[0-9]+]] : @guaranteed $Dictionary<NSObject, AnyObject>)
func testDictionaryDowncast(_ dict: Dictionary<NSObject, AnyObject>)
-> Dictionary<BridgedObjC, BridgedObjC> {
// CHECK: [[DICT_COPY:%.*]] = copy_value [[DICT]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss19_dictionaryDownCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<NSObject, AnyObject, BridgedObjC, BridgedObjC>([[DICT_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
// CHECK-NOT: destroy_value [[DICT]]
return dict as! Dictionary<BridgedObjC, BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast33testDictionaryDowncastConditional{{.*}}F
// CHECK: bb0([[DICT:%[0-9]+]] : @guaranteed $Dictionary<NSObject, AnyObject>)
func testDictionaryDowncastConditional(_ dict: Dictionary<NSObject, AnyObject>)
-> Dictionary<BridgedObjC, BridgedObjC>? {
// CHECK: [[DICT_COPY:%.*]] = copy_value [[DICT]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss30_dictionaryDownCastConditional{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<NSObject, AnyObject, BridgedObjC, BridgedObjC>([[DICT_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Optional<Dictionary<τ_0_2, τ_0_3>>
// CHECK-NOT: destroy_value [[DICT]]
return dict as? Dictionary<BridgedObjC, BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast41testDictionaryDowncastBridgedVConditional{{.*}}F
// CHECK: bb0([[DICT:%[0-9]+]] : @guaranteed $Dictionary<NSObject, AnyObject>)
func testDictionaryDowncastBridgedVConditional(_ dict: Dictionary<NSObject, AnyObject>)
-> Dictionary<BridgedObjC, BridgedSwift>? {
// CHECK: [[DICT_COPY:%.*]] = copy_value [[DICT]]
// CHECK: [[BRIDGE_FN:%[0-9]+]] = function_ref @$ss30_dictionaryDownCastConditional{{.*}}F
// CHECK: apply [[BRIDGE_FN]]<NSObject, AnyObject, BridgedObjC, BridgedSwift>([[DICT_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Optional<Dictionary<τ_0_2, τ_0_3>>{{.*}}
// CHECK-NOT: destroy_value [[DICT]]
return dict as? Dictionary<BridgedObjC, BridgedSwift>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast41testDictionaryDowncastBridgedKConditional{{.*}}F
// CHECK: bb0([[DICT:%[0-9]+]] : @guaranteed $Dictionary<NSObject, AnyObject>)
func testDictionaryDowncastBridgedKConditional(_ dict: Dictionary<NSObject, AnyObject>)
-> Dictionary<BridgedSwift, BridgedObjC>? {
// CHECK: [[DICT_COPY:%.*]] = copy_value [[DICT]]
// CHECK: [[BRIDGE_FN:%[0-9]+]] = function_ref @$ss30_dictionaryDownCastConditional{{.*}}F
// CHECK: apply [[BRIDGE_FN]]<NSObject, AnyObject, BridgedSwift, BridgedObjC>([[DICT_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Optional<Dictionary<τ_0_2, τ_0_3>>
// CHECK-NOT: destroy_value [[DICT]]
return dict as? Dictionary<BridgedSwift, BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast31testDictionaryDowncastBridgedKV{{.*}}F
// CHECK: bb0([[DICT:%[0-9]+]] : @guaranteed $Dictionary<NSObject, AnyObject>)
func testDictionaryDowncastBridgedKV(_ dict: Dictionary<NSObject, AnyObject>)
-> Dictionary<BridgedSwift, BridgedSwift> {
// CHECK: [[DICT_COPY:%.*]] = copy_value [[DICT]]
// CHECK: [[BRIDGE_FN:%[0-9]+]] = function_ref @$ss19_dictionaryDownCast{{.*}}F
// CHECK: apply [[BRIDGE_FN]]<NSObject, AnyObject, BridgedSwift, BridgedSwift>([[DICT_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
// CHECK-NOT: destroy_value [[DICT]]
return dict as! Dictionary<BridgedSwift, BridgedSwift>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast42testDictionaryDowncastBridgedKVConditional{{.*}}F
// CHECK: bb0([[DICT:%[0-9]+]] : @guaranteed $Dictionary<NSObject, AnyObject>)
func testDictionaryDowncastBridgedKVConditional(_ dict: Dictionary<NSObject, AnyObject>)
-> Dictionary<BridgedSwift, BridgedSwift>? {
// CHECK: [[DICT_COPY:%.*]] = copy_value [[DICT]]
// CHECK: [[BRIDGE_FN:%[0-9]+]] = function_ref @$ss30_dictionaryDownCastConditional{{.*}}F
// CHECK: apply [[BRIDGE_FN]]<NSObject, AnyObject, BridgedSwift, BridgedSwift>([[DICT_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Optional<Dictionary<τ_0_2, τ_0_3>>
// CHECK-NOT: destroy_value [[DICT]]
return dict as? Dictionary<BridgedSwift, BridgedSwift>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast25testSetDowncastFromObject{{.*}}F
// CHECK: bb0([[OBJ:%[0-9]+]] : @guaranteed $AnyObject):
func testSetDowncastFromObject(_ obj: AnyObject)
-> Set<BridgedObjC> {
// CHECK: unconditional_checked_cast_addr AnyObject in [[OBJECT_ALLOC:%[0-9]+]] : $*AnyObject to Set<BridgedObjC> in [[VALUE_ALLOC:%[0-9]+]] : $*Set<BridgedObjC>
return obj as! Set<BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast15testSetDowncast{{.*}}F
// CHECK: bb0([[SET:%[0-9]+]] : @guaranteed $Set<NSObject>)
func testSetDowncast(_ dict: Set<NSObject>)
-> Set<BridgedObjC> {
// CHECK: [[SET_COPY:%.*]] = copy_value [[SET]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss12_setDownCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<NSObject, BridgedObjC>([[SET_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
// CHECK-NOT: destroy_value [[SET]]
return dict as! Set<BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast26testSetDowncastConditional{{.*}}F
// CHECK: bb0([[SET:%[0-9]+]] : @guaranteed $Set<NSObject>)
func testSetDowncastConditional(_ dict: Set<NSObject>)
-> Set<BridgedObjC>? {
// CHECK: [[SET_COPY:%.*]] = copy_value [[SET]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss23_setDownCastConditional{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<NSObject, BridgedObjC>([[SET_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Optional<Set<τ_0_1>>
// CHECK-NOT: destroy_value [[SET]]
return dict as? Set<BridgedObjC>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast22testSetDowncastBridged{{.*}}F
// CHECK: bb0([[SET:%[0-9]+]] : @guaranteed $Set<NSObject>)
func testSetDowncastBridged(_ dict: Set<NSObject>)
-> Set<BridgedSwift> {
// CHECK: [[SET_COPY:%.*]] = copy_value [[SET]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss12_setDownCast{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<NSObject, BridgedSwift>([[SET_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
// CHECK-NOT: destroy_value [[SET]]
return dict as! Set<BridgedSwift>
}
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast33testSetDowncastBridgedConditional{{.*}}F
// CHECK: bb0([[SET:%[0-9]+]] : @guaranteed $Set<NSObject>)
func testSetDowncastBridgedConditional(_ dict: Set<NSObject>)
-> Set<BridgedSwift>? {
// CHECK: [[SET_COPY:%.*]] = copy_value [[SET]]
// CHECK: [[DOWNCAST_FN:%[0-9]+]] = function_ref @$ss23_setDownCastConditional{{.*}}F
// CHECK: apply [[DOWNCAST_FN]]<NSObject, BridgedSwift>([[SET_COPY]]) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Optional<Set<τ_0_1>>
// CHECK-NOT: destroy_value [[SET]]
return dict as? Set<BridgedSwift>
}
func promote<T>(_ x: T) -> T? { nil }
// CHECK-LABEL: sil hidden [ossa] @$s19collection_downcast36testCollectionCompatibilityCoercionsyySaySiG_SayypGSgShySSGSDySSSiGtF
func testCollectionCompatibilityCoercions(_ arr: [Int], _ optArr: [Any]?, _ set: Set<String>, _ dict: [String: Int]) {
// Make sure we generate reasonable code for all of the below examples.
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss15_arrayForceCastySayq_GSayxGr0_lF : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
// CHECK: apply [[CAST_FN]]<Any, NSObject>({{%.+}}) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
_ = (optArr ?? []) as [NSObject]
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss15_arrayForceCastySayq_GSayxGr0_lF : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
// CHECK: [[RESULT:%.+]] = apply [[CAST_FN]]<Any, Optional<String>>({{%.+}}) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
// CHECK: enum $Optional<Array<Optional<String>>>, #Optional.some!enumelt, [[RESULT]] : $Array<Optional<String>>
_ = (optArr ?? []) as [String?]?
// CHECK: switch_enum {{%.+}} : $Optional<Optional<Optional<Array<Int>>>>
// CHECK: switch_enum {{%.+}} : $Optional<Optional<Array<Int>>>
// CHECK: switch_enum {{%.+}} : $Optional<Array<Int>>
// CHECK: bb{{[0-9]+}}([[ARR:%.+]] : @owned $Array<Int>)
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss15_arrayForceCastySayq_GSayxGr0_lF : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
// CHECK: apply [[CAST_FN]]<Int, Optional<Float>>([[ARR]]) : $@convention(thin) <τ_0_0, τ_0_1> (@guaranteed Array<τ_0_0>) -> @owned Array<τ_0_1>
_ = promote(promote(promote(arr))) as [Float?]
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss10_setUpCastyShyq_GShyxGSHRzSHR_r0_lF : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
// CHECK: apply [[CAST_FN]]<String, Int>({{%.+}}) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
_ = (set ?? []) as Set<Int>
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss10_setUpCastyShyq_GShyxGSHRzSHR_r0_lF : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
// CHECK: [[RESULT:%.+]] = apply [[CAST_FN]]<String, Optional<Float>>({{%.+}}) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
// CHECK: [[OPT_RESULT:%.+]] = enum $Optional<Set<Optional<Float>>>, #Optional.some!enumelt, [[RESULT]] : $Set<Optional<Float>>
// CHECK: enum $Optional<Optional<Set<Optional<Float>>>>, #Optional.some!enumelt, [[OPT_RESULT]] : $Optional<Set<Optional<Float>>>
_ = (set ?? []) as Set<Float?>??
// CHECK: switch_enum {{%.+}} : $Optional<Optional<Optional<Set<String>>>>
// CHECK: switch_enum {{%.+}} : $Optional<Optional<Set<String>>>
// CHECK: switch_enum {{%.+}} : $Optional<Set<String>>
// CHECK: bb{{[0-9]+}}([[SET:%.+]] : @owned $Set<String>)
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss10_setUpCastyShyq_GShyxGSHRzSHR_r0_lF : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
// CHECK: apply [[CAST_FN]]<String, Int>([[SET]]) : $@convention(thin) <τ_0_0, τ_0_1 where τ_0_0 : Hashable, τ_0_1 : Hashable> (@guaranteed Set<τ_0_0>) -> @owned Set<τ_0_1>
_ = promote(promote(promote(set))) as Set<Int>
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss17_dictionaryUpCastySDyq0_q1_GSDyxq_GSHRzSHR0_r2_lF : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
// CHECK: apply [[CAST_FN]]<String, Int, Float, String>({{%.+}}) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
_ = (dict ?? [:]) as [Float: String]
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss17_dictionaryUpCastySDyq0_q1_GSDyxq_GSHRzSHR0_r2_lF : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
// CHECK: [[RESULT:%.+]] = apply [[CAST_FN]]<String, Int, Double, Optional<Int>>({{%.+}}) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
// CHECK: enum $Optional<Dictionary<Double, Optional<Int>>>, #Optional.some!enumelt, [[RESULT]] : $Dictionary<Double, Optional<Int>>
_ = (dict ?? [:]) as [Double: Int?]?
// CHECK: switch_enum {{%.+}} : $Optional<Optional<Optional<Dictionary<String, Int>>>>
// CHECK: switch_enum {{%.+}} : $Optional<Optional<Dictionary<String, Int>>>
// CHECK: switch_enum {{%.+}} : $Optional<Dictionary<String, Int>>
// CHECK: bb{{[0-9]+}}([[DICT:%.+]] : @owned $Dictionary<String, Int>)
// CHECK: [[CAST_FN:%.+]] = function_ref @$ss17_dictionaryUpCastySDyq0_q1_GSDyxq_GSHRzSHR0_r2_lF : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
// CHECK: apply [[CAST_FN]]<String, Int, Int, String>([[DICT]]) : $@convention(thin) <τ_0_0, τ_0_1, τ_0_2, τ_0_3 where τ_0_0 : Hashable, τ_0_2 : Hashable> (@guaranteed Dictionary<τ_0_0, τ_0_1>) -> @owned Dictionary<τ_0_2, τ_0_3>
_ = promote(promote(promote(dict))) as [Int: String]
}
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